Revert "On key down, try to prevent backspace action"
Revert "On key down, try to prevent backspace action"

This reverts commit 607f8e14d29409b70b16af0ca95f936f734e32ed.

empirical-org/Quill-Grammar,ddmck/Quill-Grammar,ddmck/Quill-Grammar,ddmck/Quill-Grammar,empirical-org/Quill-Grammar,empirical-org/Quill-Grammar