MahApps/MahApps.Metro — pull request #965 by 100GPing100 (2014-01-20 14:51:59+00:00)
Title: Close flyout when clicking outside of it

PreviewMouseDown on MetroWindow which tries to find a Flyout parent, if it does not exist, then close the open flyouts.

PreviewMouseDown on flyoutModal to close modal flyouts when clicking on the darken area.

#962