Prevent holopatcher from taking over focus on macOS

[wesselvdv]

It's hard to have kotormodsync on in the background while it's installing. Each holopatcher invocation takes the focus, causing keyboard events to be captured by it.

[bodencrouch]

Looks like this is a mac-only problem.

I have 2 bits of code in holopatcher that hides the window when the CLI install is used, and another hide bit in KOTORModSync. Seems I need to find another solution for mac somehow.

[bodencrouch]

Does this issue happen when using the binary instead of the .app?