Bug 977056 - [Dialer] Visual discrepancies: Call ended view under conference call participants list

Yeah! I did it this way because I didn't want ConferenceGroupUI.hideGroupDetails() to "magically" apply a delay in case the overlay was shown, and wanted to give some kind of control to the function users to have a saying about if the delay should be applied or not :) Anyhow, I'll mention it in the function documentation and that should be more than enough. Thanks!