#1346 Add Behavior for TabControls to select the first visible TabItem
fix passwordbox watermark if password is set
Merge pull request #1353 from MahApps/1343-punker76-passwordbox-watermark-bug

fix passwordbox watermark if password is set
Merge pull request #1347 from badbredren/master

#1346 Add Behavior for TabControls to select the first visible TabItem
Merge remote-tracking branch 'upstream2/master'

Conflicts:
	MahApps.Metro/MahApps.Metro.NET45.csproj