gtkmm: Class Members

### - u -

- UI_MANAGER_ACCELERATOR : Gtk
- UI_MANAGER_AUTO : Gtk
- UI_MANAGER_MENU : Gtk
- UI_MANAGER_MENUBAR : Gtk
- UI_MANAGER_MENUITEM : Gtk
- UI_MANAGER_PLACEHOLDER : Gtk
- UI_MANAGER_POPUP : Gtk
- UI_MANAGER_POPUP_WITH_ACCELS : Gtk
- UI_MANAGER_SEPARATOR : Gtk
- UI_MANAGER_TOOLBAR : Gtk
- UI_MANAGER_TOOLITEM : Gtk
- UL_ANGLE : Gdk
- UMBRELLA : Gdk
- UNIT_INCH : Gtk
- UNIT_MM : Gtk
- UNIT_PIXEL : Gtk
- UNIT_POINTS : Gtk
- UNMAP : Gdk
- UPDATE_ALWAYS : Gtk
- UPDATE_CONTINUOUS : Gtk
- UPDATE_DELAYED : Gtk
- UPDATE_DISCONTINUOUS : Gtk
- UPDATE_IF_VALID : Gtk
- UR_ANGLE : Gdk