Escape should exit vim insert mode

[magnus-ISU]

As noted in #49 the vim experience is subpar because pressing escape will put you back into insert mode, not normal mode. This is very annoying, and I don't want to have to double-press escape all the time. Pressing it once should put you into normal mode.

This should happen regardless of whether you have the first option selected by default or not (the option from #49)

[janacm]

Not seeing this happen anymore