Delete unused selected argument in adminbar.html.
Untangle menus and buttons.
Set cachable_attrs on all buttons and menus.
Delete unused multicolumn navmenu.
Delete unused heavydrop navmenu type.
Mark "admins*" text for translation.
menus: Clean up imports.
Hide private SR details on RSS error pages
Removal message: add date/time info in tooltip
NamedButton: pass css_class to NavButton constructor.