MAGETWO-40070: Incorrect Relative Paths in LESS File

- Fixed incorrect relative paths in setup.less

Author: Bogdan Plieshka

app/design/adminhtml/Magento/backend/web/app/setup/styles/less/setup.less

@@ -15,14 +15,14 @@
 @import '/lib/web/css/source/lib/_lib.less';
 
 //  Inherit Backend lib (sources)
-@import '../../../../../web/css/source/_variables.less';
-@import '../../../../../web/css/source/_utilities.less';
-@import '../../../../../web/css/source/_extends.less';
-@import '../../../../../web/css/source/_reset.less';
-@import '../../../../../web/css/source/_typography.less';
-@import '../../../../../web/css/source/_lists.less';
-@import '../../../../../web/css/source/_structure.less';
-@import '../../../../../web/css/source/_grid.less';
+@import '../../../../css/source/_variables.less';
+@import '../../../../css/source/_utilities.less';
+@import '../../../../css/source/_extends.less';
+@import '../../../../css/source/_reset.less';
+@import '../../../../css/source/_typography.less';
+@import '../../../../css/source/_lists.less';
+@import '../../../../css/source/_structure.less';
+@import '../../../../css/source/_grid.less';
 
 //  Setup lib (sources)
 @import 'lib/_variables.less';
@@ -51,17 +51,17 @@
 @import '/lib/web/css/source/components/_modals.less';
 
 //  Inherit Backend components
-@import '../../../../../web/css/source/_actions.less';
-@import '../../../../../web/css/source/components/_messages.less';
-@import '../../../../../web/css/source/components/_modals_extend.less';
+@import '../../../../css/source/_actions.less';
+@import '../../../../css/source/components/_messages.less';
+@import '../../../../css/source/components/_modals_extend.less';
 
 @import '../../../../../Magento_Backend/web/css/source/module/_header.less';
 @import '../../../../../Magento_Backend/web/css/source/module/_menu.less';
 
 @import '../../../../../Magento_Ui/web/css/source/module/_data-grid.less';
-@import (reference) '../../../../../web/css/source/forms/_extends.less';
-@import '../../../../../web/css/source/forms/_controls.less';
-@import '../../../../../web/css/source/forms/_fields.less';
+@import (reference) '../../../../css/source/forms/_extends.less';
+@import '../../../../css/source/forms/_controls.less';
+@import '../../../../css/source/forms/_fields.less';
 
 //  Setup components
 @import 'components/_messages.less';
@@ -101,4 +101,4 @@
 //  Media queries collector
 //  ---------------------------------------------
 
-@import '../../../../../web/css/source/_responsive.less';
+@import '../../../../css/source/_responsive.less';