Calendar: fix dayOfWeekDelegate positioning
Calendar: fix dayOfWeekDelegate positioning

The grid line width needs to be taken into account

Change-Id: I13ecf5e32d1ae3fa967bbd01ae104686ee371411
Reviewed-by: Mitch Curtis <a74594a5101269175fe1b140badc4c0b6f699d25@digia.com>

mizukusak/qtquickcontrols,mizukusak/qtquickcontrols,mizukusak/qtquickcontrols