[Frontend] Hide/show Create button in mobile

open #250
open #157
Create button now hidden by default in mobile via
usage of CSS; can be re-displayed by including
'example/mobile' bundle;

platform/commonUI/general/res/sass/mobile/_constants.scss

@@ -20,6 +20,8 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
+/* REQUIRES /platform/commonUI/general/res/sass/_constants.scss */
+
 /************************** MOBILE REPRESENTATION ITEMS DIMENSIONS */
 $mobileListIconSize: 30px;
 $mobileTitleDescH: 35px;

platform/commonUI/general/res/sass/mobile/_layout.scss

@@ -44,6 +44,12 @@
         }
     }
 
+    .create-btn-holder {
+        // Hide the create button by default in mobile;
+        // This can be overridden by an example bundle to come
+        display: none;
+    }
+
     .holder.holder-treeview-elements {
         right: $bodyMargin !important;
     }

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

@@ -20,6 +20,8 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
+/* REQUIRES /platform/commonUI/general/res/sass/mobile/_constants.scss */
+
 // Phones in any orientation
 @mixin phone {
     @media #{$phonePortrait},