MAGETWO-45177: Improve indents in the less files according less code standards

- Merge remote-tracking branch 'origin/MAGETWO-45177' into PR-1

- Conflicts:
	- app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/pages/_login.less
	- app/design/adminhtml/Magento/backend/web/app/setup/styles/less/pages/_readiness-check.less
	- app/design/adminhtml/Magento/backend/web/css/source/_structure.less
	- app/design/frontend/Magento/blank/Magento_GroupedProduct/web/css/source/_module.less
	- app/design/frontend/Magento/luma/Magento_Catalog/web/css/source/_module.less
	- app/design/frontend/Magento/luma/Magento_GiftRegistry/web/css/source/_module.less
	- app/design/frontend/Magento/luma/Magento_GroupedProduct/web/css/source/_module.less

Author: Natalia Momotenko

app/design/adminhtml/Magento/backend/Magento_AdminNotification/web/css/source/_module.less

@@ -17,6 +17,7 @@
 .message-system-inner {
     &:extend(.abs-clearfix all);
     background: @message-system__background-color;
+
     .message-system-list {
         float: left;
         width: 75%;
@@ -32,13 +33,16 @@
 .message-system-short {
     overflow: hidden;
     text-align: right;
+
     .message-system-short-label {
         display: inline-block;
         padding: @message-system-short-message__padding-vertical .3rem @message-system-short-message__padding-vertical 1rem;
     }
+
     .message {
         display: inline-block;
         padding: @message-system-short-message__padding-vertical 2rem @message-system-short-message__padding-vertical 3.3rem;
+
         &:before {
             left: .3rem;
         }

app/design/adminhtml/Magento/backend/Magento_AdvancedCheckout/web/css/source/_module.less

@@ -7,6 +7,7 @@
     .accordion & {
         margin: 0 0 @indent__base;
     }
+
     .add-sku-csv {
         .admin__field-label {
             &:before {

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/_module-old.less

@@ -17,6 +17,7 @@
     background-color: #fff;
     border: 1px solid #ada89e;
     border-radius: 2px;
+
     &:after {
         position: absolute;
         top: 3px;
@@ -33,13 +34,15 @@
         font-size: 18px;
         color: #b2b2b2;
     }
+
     input[type="search"],
     input.search {
         width: 100%;
         border: none;
         background: none;
         padding-right: 30px;
     }
+
     &.category-select {
         input[type="search"],
         input.search {
@@ -56,6 +59,7 @@
     background-color: transparent;
     border: none;
     border-radius: 0;
+
     &:after {
         display: none;
     }
@@ -71,21 +75,26 @@
     background: #fff;
     box-shadow: 0 2px 4px rgba(0, 0, 0, .2);
     z-index: 990;
+
     ul {
         margin: 0;
         padding: 0;
         list-style: none;
     }
+
     li {
         border-bottom: 1px solid #e5e5e5;
         padding: 0;
+
         a {
             display: block;
+
             &.ui-state-focus {
                 background: #f5f5f5;
             }
         }
     }
+
     li a,
     .jstree li a:hover,
     .jstree .jstree-hovered,
@@ -95,18 +104,22 @@
         color: #333;
         height: inherit !important;
     }
+
     .jstree {
         li a:hover,
         .jstree-hovered,
         .jstree-clicked {
             border: none;
         }
+
         li {
             border-bottom: 0;
+
             a {
                 display: inline-block;
             }
         }
+
         .mage-suggest-selected > a {
             color: #000;
             background: #F1FFEB;
@@ -158,35 +171,42 @@
         font-size: 12px;
         padding: 5px 4px;
         filter: none;
+
         span {
             display: inline;
         }
+
         &:before {
             display: inline-block;
             float: right;
             margin-left: 4px;
             font-size: 13px;
             color: #b2b0ad;
         }
+
         &:hover:before {
             color: #7e7e7e;
         }
     }
+
     .dropdown-menu {
         margin: 1px 0 0;
         left: 0;
         right: auto;
         width: 245px;
         z-index: 4;
     }
+
     .mage-suggest {
         border: none;
         border-radius: 3px 3px 0 0;
+
         &:after {
             top: 10px;
             right: 8px;
         }
     }
+
     .mage-suggest-inner {
         .title {
             margin: 0;
@@ -196,6 +216,7 @@
             font-size: 12px;
             border-bottom: 1px solid #e5e5e5;
         }
+
         > input[type="search"],
         > input.search {
             position: relative;
@@ -205,11 +226,13 @@
             width: 236px;
             z-index: 1;
         }
+
         > input.ui-autocomplete-loading,
         > input.mage-suggest-state-loading {
             background: #fff url("@{baseDir}mui/images/ajax-loader-small.gif") no-repeat 190px 50%;
         }
     }
+
     .mage-suggest-dropdown {
         margin-top: 0;
         border-top: 0;
@@ -218,6 +241,7 @@
         overflow: auto;
         width: 100%;
         float: left;
+
         ul {
             margin: 0;
             padding: 0;

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_footer.less

@@ -26,6 +26,7 @@
     color: @footer__color;
     margin-top: auto;
     padding: 2.6rem 2rem 6rem 3rem;
+
     a {
         .lib-link(
             @_link-color: @footer-link__color,
@@ -38,6 +39,7 @@
             @_link-text-decoration-active: false
         );
     }
+
     .admin__control-select {
         max-width: 52rem;
         width: 100%;
@@ -46,6 +48,7 @@
 
 .magento-version {
     margin-bottom: .5rem;
+
     strong {
         color: @footer-version__color;
     }
@@ -56,16 +59,19 @@
     margin-bottom: -.2rem;
     text-align: left;
     position: relative;
+
     .link-copyright {
         display: inline-block;
         margin-right: .5rem;
         text-decoration: none;
         vertical-align: top;
+
         &:hover {
             &:before {
                 color: lighten(@color-light-phoenix, 10%);
             }
         }
+
         &:before {
             &:extend(.abs-icon all);
             .transition(color);
@@ -76,6 +82,7 @@
             position: relative;
             top: -.2rem;
         }
+
         &:active {
             &:before {
                 .scale();

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_menu.less

@@ -191,6 +191,7 @@
         &:first-child {
             > a {
                 position: relative;
+
                 //  Separator between logo and menu
                 &:after {
                     &:extend(.abs-menu-separator);
@@ -205,6 +206,7 @@
                 }
             }
         }
+
         //  Hover & active state for menu level 0 item
         &._active,
         &:hover {
@@ -317,6 +319,7 @@
 
         .parent {
             margin-bottom: 4.5rem;
+
             //  Section title
             > a, // ToDo UI: Should be deleted after template changes a -> strong.submenu-group-title
             .submenu-group-title {

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/header/actions-group/_notifications.less

@@ -36,11 +36,14 @@
     float: right;
     line-height: 1;
     position: relative;
+
     &.active {
         z-index: @notifications-action-menu__z-index; // Should be over global search when active
+
         .notifications-action {
             border-color: @action-dropdown__active__border-color;
             box-shadow: @component__box-shadow__base;
+
             &:after {
                 border: none;
                 background-color: @action-dropdown__background-color;
@@ -56,6 +59,7 @@
             }
         }
     }
+
     //  Notifications dropdown
     .admin__action-dropdown-menu {
         padding: 1rem 0 0;
@@ -67,21 +71,25 @@
     color: @notifications-action__color;
     height: @page-header-action__height;
     padding: @notifications-action__padding-top @notifications-action__padding-side @notifications-action__padding-bottom;
+
     &:after {
         display: none;
     }
+
     &:before {
         &:extend(.abs-icon all);
         content: @icon-notification-02__content;
         font-size: @notifications-action-icon__size;
         margin-right: 0;
     }
+
     &:active {
         &:before {
             position: relative;
             top: 1px;
         }
     }
+
     .notifications-counter {
         background-color: @notifications-counter__background-color;
         border-radius: 1em;
@@ -103,24 +111,30 @@
     padding: @notifications-entry__padding-top @notifications-action__padding-side .8rem;
     position: relative;
     transition: @smooth__background-color;
+
     &:hover {
         background-color: @notifications-entry__hover__background-color;
     }
+
     &.notifications-entry-last {
         margin: 0 @notifications-action__padding-side;
         padding: .3rem 0 1.3rem;
         text-align: center;
+
         &:hover {
             background-color: transparent;
         }
     }
+
     + .notifications-entry-last {
         border-top: 1px solid @color-light-gray;
         padding-bottom: .6rem;
     }
+
     //  Case with cutted message description
     ._cutted {
         cursor: pointer;
+
         .notifications-entry-description-start {
             &:after {
                 content: '...';
@@ -146,6 +160,7 @@
 
 .notifications-entry-description-end {
     display: none;
+
     &._show {
         display: inline;
     }
@@ -163,17 +178,20 @@
     position: absolute;
     right: 0;
     top: .6rem;
+
     &:before {
         &:extend(.abs-icon all);
         color: @notifications-close__color;
         content: @icon-remove-small__content;
         .transition(color);
     }
+
     &:hover {
         &:before {
             color: darken(@notifications-close__color, 10%);
         }
     }
+
     &:active {
         transform: scale(.95);
     }