fix non working backspace key when content of cell is deleted the whole cell is deleted
fix non working backspace key
when content of cell is deleted the whole cell is deleted

HelioGuilherme66/RIDE,robotframework/RIDE,robotframework/RIDE,HelioGuilherme66/RIDE,HelioGuilherme66/RIDE,HelioGuilherme66/RIDE,robotframework/RIDE,robotframework/RIDE