Fixed the vertical alignment of the WindowsCommands
Fixed the vertical alignment of the WindowsCommands

If the maximize, minimize and close buttons were hidden, the vertical
alignment of the WindowCommands was not centered

Jack109/MahApps.Metro,xxMUROxx/MahApps.Metro,psinl/MahApps.Metro,p76984275/MahApps.Metro,MahApps/MahApps.Metro,Danghor/MahApps.Metro,ye4241/MahApps.Metro,batzen/MahApps.Metro,jumulr/MahApps.Metro,Evangelink/MahApps.Metro,pfattisc/MahApps.Metro,chuuddo/MahApps.Metro