Add support for multiple keybinds for one control (SBACKSPACE) #272
Description
For most other programs shift+backspace works like regular backspace, deleting the character and moving the caret back by one. However, Wordgrinder treats shift+backspace as a separate (unbound) keybind, and I have the issue where I accidentally hit shift+backspace when i mean to simply hit backspace, which for most programs still registers as backspace.
Since some users may use shift+backspace for something, I suggest adding support for multiple keybinds so I could bind backspace functionality to both SBACKSPACE and BACKSPACE.