[Frontend] New .loading class

open #190
CSS for revised .loading class;
Commented out/removed old .loading styles;
Theme constants for loading colors added
to theme files;

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

@@ -375,20 +375,6 @@
     overflow-y: $showBar;
 }
 
-@mixin wait-spinner($b: 5px, $c: $colorAlt1) {
-    display: block;
-    position: absolute;
-    -webkit-animation: rotation .6s infinite linear;
-    -moz-animation: rotation .6s infinite linear;
-    -o-animation: rotation .6s infinite linear;
-    animation: rotation .6s infinite linear;
-    border-color: rgba($c, 0.25);
-    border-top-color: rgba($c, 1.0);
-    border-style: solid;
-    border-width: $b;
-    border-radius: 100%;
-}
-
 @mixin test($c: #ffcc00, $a: 0.2) {
     background-color: rgba($c, $a) !important;
 }