- fixes the large statusbar with GTK3
- remove extra resize-grip code, which is handle by gtk+ itself
GTK2 builds displays the resize-grip without the extra code.
Since GTK+-3.14 the rezise-grip widget is removed.
- the size of the statusbar is now themable
Replace functions available in gtk+2 and gtk+3
gdk_window_get_* | since 2.24
gtk_widget_get_allocation | since 2.18
gtk_widget_get_window | since 2.14
gtk_window_get_group | since 2.10
gtk_widget_get_mapped | since 2.20
gtk_widget_get_realized | since 2.20
gdk_window_get_display | since 2.24
Remove deprecated GtkNotebookPage and check.
The replacement functions are available since 2.18
GTK_WIDGET_HAS_FOCUS -> gtk_widget_has_focus
GTK_WIDGET_VISIBLE -> gtk_widget_get_visible
GTK_WIDGET_SET_FLAGS -> gtk_widget_set_*