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/mobile/_layout.scss

@@ -138,7 +138,7 @@ body.phone.portrait {
         }
         .pane.right.items {
             left: 0 !important;
-            @include transform(translateX($proporMenuOnly));
+            transform: translateX($proporMenuOnly);
             .holder-object-and-inspector {
                 opacity: 0;
             }