gtk-2: menu is now bright background and dark foreground.
gtk-2: try removing irregular settings for dark theme.
gtk-2: highlight button label when hover.
gtk-2: set menuitem foreground when selected.
gtk-2: menubar bg color when selected.
gtk-2: radio/check boxes.
gtk-2: combobox entry foreground color when hover
gtk-2: fix scrollbar width and trough.
gtk-2: highlight scrollbar slider when hovered.