miqSetButtons - reset toolbar count to 0 when miqSetButtons called with 0
miqSetButtons - reset toolbar count to 0 when miqSetButtons called with 0

before the toolbar refactor, miqSetButtons would set everything to the right count.

It is still being called in places where we need to update the toolbar count, but doesn't work most of the time because it no longer touches any toolbars.

This needs more refactoring to be clean, but for now, at least we should reset the toolbar to 0 when asked to :).

https://bugzilla.redhat.com/show_bug.cgi?id=1440142

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic