<accelerator name="BackSpaceAccel" action="BackSpace"/>
<accelerator name="ShiftSpaceAccel" action="ShiftSpace"/>
<accelerator name="ShiftBackSpaceAccel" action="ShiftBackSpace"/>
<accelerator name="BackSpaceAccel" action="BackSpace"/>
<accelerator name="ShiftSpaceAccel" action="ShiftSpace"/>
<accelerator name="ShiftBackSpaceAccel" action="ShiftBackSpace"/>