Add keybindings for common editor features

[TeamDman]

Currently, SFM has keybinds like ctrl+c and ctrl+/ and \ for accepting intellisense suggestions.
Might be good to detach keybinds from actions, add a command palette, and add key bindings to bind to actions.

Probably want a pretty sophisticated binding UI.
If we use the MC binding, we will create a lot and will be noisy when adding a lot of keyboard shortcuts that only are active in an editor screen, so perhaps best to isolate?

[TeamDman]

hehe not quite, looks like your system picked an older branch to work off