Update tool-windows.tmpl

SI-7355 scala.bat cannot handle space in paths
Changed "%1%" to "%~1%" to allow spaces in paths according to advice at http://stackoverflow.com/questions/473117/pass-path-with-spaces-as-parameter-to-bat-file
Test case failing before fix:
PS C:\Users\bjornr> scala "test blank/myJar.jar"
blank/myJar.jar""=="-toolcp" was unexpected at this time.
Is not failing after fix.