GtkEntry: Stop exporting _gtk_entry_grab_focus
The name is confusing and it only exists so we can decide whether the text should be selected upon focusing. However, we now also have a gtk_entry_grab_focus_without_selecting
that explicitly does not select the text.
So, we can remove _gtk_entry_grab_focus
and replace it with either the normal gtk_widget_grab_focus
(which might select the text) or gtk_entry_grab_focus_without_selecting
, which won't select the text.