fdo#86183 set ctrl+shift+e to track changes and reassign edit mode

Change-Id: If1bfbc6686dd164eba9a705fbdb72fa0a08cdefe
Reviewed-on: https://gerrit.libreoffice.org/12415
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>