BUGFIX: NumLock gets toggled on run

Added a couple of "SendKeys" because they were toggeling the NumLock
button (Excel/VBA bug), not the prettiest solution but all my tries to
emulate the button click and get the state before and after "SendKeys"
where called failed. (Dunno why, but it seems all these changes to the
NumLock makes it dizzy so it's not sure if it's on or off)