Review SCSS refactoring for to-be-deprecated Bourbon functions (#1959)

* [Frontend] Refactor SCSS to remove deprecated @includes

Fixes #1891
- In progress

* [Frontend] Refactor SCSS to remove deprecated @includes

Fixes #1891
Making bourbon happy by refactoring to-be-deprecated
calls to prefixing @includes:
- transform and related CSS;
- flex and related CSS;
- Fixed double semi-colons to single;

platform/commonUI/general/res/sass/_icons.scss

@@ -83,8 +83,8 @@
             height: auto; width: auto;
             position: absolute;
             left: 0; top: 0; right: 0; bottom: 20%;
-            @include transform-origin(bottom left);
-            @include transform(scale(0.3));
+            transform-origin: bottom left;
+            transform: scale(0.3);
             z-index: 2;
         }
     }