Clear view in accelerator Without Unchecking Objects one by one?

Some source tree lists have 25+ objects. I use check-all/uncheck-all to clear out the panel, but sometimes this takes a while to refresh. Anyone know how to expedite this process?

This is currently not a feature in BimlFlex. It is being evaluted for inclusion in a future release.
        
Please stay tuned for application updates and announcements.