Implement rose-edit load all apps button and menu item.
Merge remote branch 'upstream/master' into rose-edit-load-all
Move sensitivity updates to update_widgets method.
Refactor for update_widgets.
Add _ to Load All Apps menu entry.
Load all uses single splash screen.
Drop leading / from namespace in dialog.
Merge remote branch 'upstream/master' into rose-edit-load-all
Merge pull request #849 from arjclark/rose-edit-load-all

rose edit: implement load all apps toolbar button and menu item.