[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/dialog/res/templates/dialog.html

@@ -34,13 +34,13 @@
     </div>
 </div>
 <div class="abs bottom-bar">
-    <a class='btn lg major'
-       href=''
+    <a class='s-btn major'
        ng-class="{ disabled: !createForm.$valid }"
        ng-click="ngModel.confirm()">
         OK
     </a>
-    <a class='btn lg subtle' href='' ng-click="ngModel.cancel()">
+    <a class='s-btn'
+       ng-click="ngModel.cancel()">
         Cancel
     </a>
 </div>