Fix -nomousegrab flag

[GravisZro]

HardwareOpenGL incorrectly has "-nomousecap" instead of "-nomousegrab"

• Runtime changes
  • Input changes

Description

I ran into the issue where "-nomousegrab" wasn't working and found the cause. Very simple fix.

Checklist

• I have tested my changes locally and verified that they work as intended.
• I have documented any new or modified functionality.
• I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

[Lgt2x]

Nice catch, thanks! This option is missing from our wiki page, I'll update it.