Update sensitivity when removing an editor
Update sensitivity when removing an editor

If we remove the last editor that needs calculation, we should disable
the Calculate action.

rschroll/reinteract,johnrizzo1/reinteract,rschroll/reinteract,alexey4petrov/reinteract,rschroll/reinteract,johnrizzo1/reinteract,jbaayen/reinteract,jbaayen/reinteract,alexey4petrov/reinteract,alexey4petrov/reinteract,johnrizzo1/reinteract,jbaayen/reinteract