MC-3499: Variable placeholder are overlap and stick to each other in small container

- Fixed issue

Author: nathanjosiah

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/_inline-wysiwyg.less

@@ -10,7 +10,9 @@
 .inline-wysiwyg {
     .magento-placeholder {
         height: auto;
+        margin: 5px;
         min-height: 20px;
+        vertical-align: baseline;
     }
     &.mce-edit-focus {
         outline: none;

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/content-type/text/_default.less

@@ -18,10 +18,6 @@
                 margin: 0 0 @margin 0;
             }
         }
-        p {
-            margin-bottom: 0;
-            padding-bottom: @margin;
-        }
         .mce-tinymce-inline {
             left: -2px !important;
             right: -2px;