Removes button to fill import terrain images temporarily to contend with limitations in asset creation workflow
Adds sanity check to saving terrain material that obligates setting of diffuse and detail maps so everything displays and blends properly
Adds missing disconnect/timeout handling callbacks to the clientServer core module
Adds page refresh function to UINavigation to be able to selectively nudge the current page to refresh its contents if needbe
Added proper container bracketing for the main menu buttons and made that the main navigation target
Added logic to UINav to prevent needlessly re-setting the root page if it already is the root page, which would break the navigation stack
Added logic to UINav toprevent needlessly adding duplicate pages whicn would break the navigation stack
Added logic to close the chooseLevelDlg page when the level is loaded to avoid the page being left hanging on the nav stack
Fixed assetId for no preview image fallback on the chooseLevelDlg page
Fixed display of icons in the shape editor shape helper section
Fixed name lookup on terrain material editor dialogue which would break saving of terrain materials
Disables TORQUE_SFX_DirectX which is currently not in use and nonfunctional
Also fixes behavior handling of menu input buttons not refreshing reliably
Adds ability to define a control on a MenuList to act as a highlighter over the currently selected control
Cleaned up BaseUI pages to use UINavigation which reduced a lot of duplication of elements and code
