* xed-app.c: replace get_active_window with gtk_application version
This allows us to remove quite a bit of code, some of which uses
deprecated functions, so it also has the benefit of cleaning up the
deprecation warnings a bit.
* Switch a couple uses of gtk_show_uri with gtk_show_uri_on_window
gtk_show_uri is deprecated.
* Taglist plugin: remove call to gtk_tree_view_set_rules_hint
This function is deprecated, and it already defaults to false in
any case, so it wasn't doing anything anyway.
* Deprecations: move all instances of gtk_menu_popup to newer methods
In a couple cases this simplifies the code quite a bit
* Replace deprecated gdk_window_at_pointer with newer method