MahApps/MahApps.Metro — pull request #1344 by karno (2014-05-08 20:21:55+00:00)
Title: Fixing problem of window icon quality.

Window icon is rendering with ```EdgeMode="Aliased"``` by #417.
But sometimes icon is rendered too ugly because ```EdgeMode="Aliased"``` option suppresses anti-aliasing of the icon.

So, I add the dependency property for edge mode of the titlebar icon.
This fix gives option for user how to display icon of the window.