fallback-panel: properly override selection color for panel menuitems
fallback-panel: properly override selection color for panel menuitems

Since CSS for .menuitem sets background color and color for

.menu .menuitem:hover,
.menu .menuitem *:hover { }

the panel menuitems need to override it with

.gnome-panel-menu-bar .menuitem:hover,
.gnome-panel-menu-bar .menuitem:hover { }

or children that render a background inside the menuitem (such as the
GtkImages used for the menu icons) will get the default background
selection color.

https://bugzilla.gnome.org/show_bug.cgi?id=673654

rgcjonas/adwaita-semidark,magcius/gnome-themes-standard,rgcjonas/adwaita-semidark,rgcjonas/adwaita-semidark,cosimoc/gnome-themes-standard,magcius/gnome-themes-standard,Distrotech/gnome-themes-standard,rgcjonas/adwaita-semidark,ChrisCummins/gnome-themes-standard,cosimoc/gnome-themes-standard,DoctorJellyface/gnome-themes-standard,ChrisCummins/gnome-themes-standard,cosimoc/gnome-themes-standard,magcius/gnome-themes-standard,ChrisCummins/gnome-themes-standard,DoctorJellyface/gnome-themes-standard,ChrisCummins/gnome-themes-standard,Distrotech/gnome-themes-standard,ChrisCummins/gnome-themes-standard,cosimoc/gnome-themes-standard