Fix hardware cursor not showing on mirror displays

[lucasreis1]

Describe your PR, what does it fix/add?

Ensure cursor is rendered on mirror displays when using hardware cursor. (Fixes #6455 )

Is there anything you want to mention? (unchecked code, possible bugs, found problems, breaking compatibility, etc.)

AFAIK this is a hack but works well on my system (using nvidia :)).

Is it ready for merging, or does it need work?

I guess it is, but again it's a hack so there could be tons of better solutions for this

[vaxerski]

also maybe we should just lock software? this will break if the output mirroring is a different res

[lucasreis1]

this will break if the output mirroring is a different res

How? I tried to account for that here: 3364e76#diff-649995ddb095587b539b1ea9cbe9bb01f749557ff5f34229f0688a276b957493R396

Tested on my system mirroring a 1440p screen to a 1080p monitor and it worked fine.

[vaxerski]

what about different aspect ratios? What about stretching? Size?

[lucasreis1]

If you think that'd be solved by some transforms when handling pointer positions on onCursorMoved I can take a look, but if it's way more complicated than that I can make another PR to force software cursors when mirrors exist. But I'd be a shame

[vaxerski]

I believe software cursors on mirrors are the way to go.

[lucasreis1]

Sure, I'll convert this to a draft if you don't mind because I'd still like to tackle it later