bind $ui_diff <$M1B-Key-V> {break}
bind $ui_diff <$M1B-Key-a> {%W tag add sel 0.0 end;break}
bind $ui_diff <$M1B-Key-A> {%W tag add sel 0.0 end;break}
+bind $ui_diff <$M1B-Key-j> {do_revert_selection;break}
+bind $ui_diff <$M1B-Key-J> {do_revert_selection;break}
bind $ui_diff <Key-Up> {catch {%W yview scroll -1 units};break}
bind $ui_diff <Key-Down> {catch {%W yview scroll 1 units};break}
bind $ui_diff <Key-Left> {catch {%W xview scroll -1 units};break}
bind . <$M1B-Key-S> do_signoff
bind . <$M1B-Key-t> do_add_selection
bind . <$M1B-Key-T> do_add_selection
+bind . <$M1B-Key-u> do_unstage_selection
+bind . <$M1B-Key-U> do_unstage_selection
bind . <$M1B-Key-j> do_revert_selection
bind . <$M1B-Key-J> do_revert_selection
bind . <$M1B-Key-i> do_add_all