[Frontend] IN-PROGRESS Theme changes continuing

open #95
Mostly about the overlay and forms;
Buttons, menus, selects tweaks continued;
Initial check and tweaks in mobile;

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

@@ -20,9 +20,6 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
-/************************** STYLE */
-$colorMobilePaneLeft: #222;
-
 /************************** MOBILE REPRESENTATION ITEMS DIMENSIONS */
 $mobileListIconSize: 30px;
 $mobileTitleDescH: 35px;