Menu Item Color implemented. Need to fix the multiple inheritance issues
and standardize the MenuItem type quite a bit.
Merge branch 'master' into menu-theming
Implemented test and element basis of the new gears menu system to come.
Touchups and enhancements to MenuElement.
Implemented theming without mouse support. Needs tests and examples next.
Staged first menu test with new menu, to show its customizability and
ability to seamlessly interface with the old menu system.
Merge branch 'master' into menu-theming
Cleaned up the way Gears uses ClearEventHandler() for input.