Toggle xmonad workspaces with backtick

My habit is to use the left alt rather than the right. Left alt + z
causes me to cram my fingers together too closely. The backtick/tilde
key is positioned such that it can be used with both the left and right
alt keys, and it makes sense considering the standard alt + tab
behavior that most window managers implement.
Change vim spell-check key

Those function keys are so far away...