minor fix to launcher.sh

[lucienboland]

Great extension! Thanks.

If you are using the launcher.sh with "--signature=....." argument. You need to remove one of the "shift" lines (either line 98 or 99) in the "--signature=*)" clause of the argument handling while loop. Otherwise it could potentially skip over a argument following the "--signature=..." argument.

Might help someone. Alternatively simply use the '-s' or '--signature' without the '='.

Cheers