[Frontend] Significant re-factoring of CSS and markup

open #95
IN-PROGRESS!;
Mostly buttons and menus classes (s-btn and s-menu);
Removed unused templates and .css files;
Normalized some button containers;

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

@@ -54,7 +54,7 @@
 	display: inline-block;
 }
 
-.btn-menu .invoke-menu,
+.s-menu .invoke-menu,
 .icon.major .invoke-menu {
 	margin-left: $interiorMarginSm;
 }