Do not handle keystrokes for contentEditable.
Do not handle keystrokes for contentEditable (refactor).
 Do not handle keystrokes for contentEditable (check find mode).

 It is not strictly necessary to check find mode here.  However, if we
 don't do so, then we leave a booby trap for future developers.  So we
 do the extra check.  This, hopefully, means that we don't suddenly find
 ourselves dropping into insert mode just because somebody reorders the
 code elsewhere.
Revert 3f3f256e1abe2a7795ba89ff6b84d4b81fb0a7e2.

On reflection, 3f3f256e1abe2a7795ba89ff6b84d4b81fb0a7e2 seems like a bad
idea.  It's unnecessary, and risks unforeseen consequences.
Merge branch 'contentEditable-fix' of github.com:smblott-github/vimium