Marc Olson [Mon, 20 Aug 2018 22:46:08 +0000 (15:46 -0700)]
Create dialog to rescan for new headsets
If the headset is plugged in (or repluged) after the library is
initialized, the library does not pick it up. This adds an action
allowing the user to trigger a rescan.
Signed-off-by: Marc Olson <marcolso@amazon.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>