Fix Menus for sorting/layout/shows

Remove old popup code
Hide Layout mode menu on release builds
Rework menu code to make it cleaner
Strip down menu helper functions down to just one essential and remove 'unchecking' for radio groups, as they are actually smart enough to handle that themselves.
Includes some random menu fixes and code reordering.
Move setSorting helper function to FileManagerSettings
Finish cleaning up toggle menus

Add setLayout helper function
Move toggleViewPreference to FileManagerSettings
Merge pull request #64 from BrandoCommando/dev-issue58-menus

Fix menu selections for sort/layout/shows