MahApps/MahApps.Metro — pull request #661 by spiritdead (2013-09-09 18:14:08+00:00)
Title: Update FlatSlider.xaml

change the minheight/minwidth in the Track.Thumb to height/width

if you use min you can resize in the designer only modify the min values (and this is bad)

and of course i added the default values width/height in the trigger Orientation