Revert "Exposed button processes so that they may be used by custom buttons."
Revert "Exposed button processes so that they may be used by custom
buttons."

This was a bad approach - a lot of extra state needs to get put in
before these processes can be used..

This reverts commit aa1dcfa7b2d3e1811f16f513c4aa474c3f5f41b4.

cse-bristol/multiuser-file-menu,cse-bristol/multiuser-file-menu