Removed colors from Icomoon named icons

Tracker item: http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=30257

Only the Joomla (JUI) icons classes will get the assigned colors. This way you can still use the original Icomoon classnames to get the icon without the color.
Example:
- icon-apply and icon-edit will be blue
- icon-pencil will not be specifically colored

This change should not change anything visually in the current Isis template (as it uses the JUI class names, and their styles remain the same). It does however give developers the ability to use the icons without the assigned colors.

#### Changes
- Removed color from original icomoon classes
- Added 'icon-default' classname (same as icon-featured)
- Changed use of icomoon classes to JUI classes where needed
- Changed use of JUI classes to icomoon classes in status modules (so the remain grey)

#### Testing Instructions
Check all the views in the administrator and see if any icons loose the color