Tablet in-game setting work outside osu! and you can control osu! outside its windows with tablet.

[HelloYeew]

Describe the bug:
So, in macOS you can set a shortcut in Mission Control that you can move space (or windows) that full screen to left or right (In my computer I set as control + right/left key)

So when I enable tablet control in osu! setting) a problem is if I use a 'move space' function in macOS and still use tablet as a mouse you can control an osu! outside it's windows or you can control both windows in one time.

You can easily reproduce this bug by:
Ps. To reproduce this, don't use physical mouse or MacBook's trackpad, use tablet only.
1.Open something in left or right of osu! as full screen mode. It's look like this in mac's mission control. (it can be desktop screen but it's hard to easily notice that you can control both windows.

2.Turn off tablet setting in osu!
3.Move to another screen by shortcut (You can use short cut by a picture above or with a three finger on trackpad.)
4.You can see that no thing happen or no bug occured.
5.Back to osu! screen, then turn on tablet setting.
6.In osu! screen when you control a mouse with tablet it's in osu! ratio (Yes, because OpenTabletDriver) but if you move to another screen by shortcut it still have a conflict between tablet driver and OpenTabletDriver like last version of osu!lazer but more than that, you can control an osu! outside its window (As seen on video) and control that window in a same time.

Screenshots or videos showing encountered issue:
I record live log screen too in case a problem with a sound in video. (Because if I don't record a log or a sound you don't know that I can control osu! outside its window) and all mouse control in video I use tablet only.

• With custom ratio on tablet setting
  https://drive.google.com/file/d/1Lt1bBmj49oDo0pT4u0y8Rd8xZdtg_maT/view?usp=sharing
• Then, I concerned if I set tabet area to full is this bug still happened? Yes, it happened.
  https://drive.google.com/file/d/1Ma4xT1OOeLpS0MJTmGJAHcMuuW-Q9QLg/view?usp=sharing

Ps. Sorry for low FPS because of OBS.

osu!lazer version:
2021.331.0

Logs:
From first video (Custom tablet area)
database.log
network.log
performance-audio.log
performance-draw.log
performance-update.log
performance.log
runtime.log

From second video (Full tablet area)
database.log
network.log
performance-audio.log
performance-draw.log
performance-update.log
performance.log
runtime.log

Computer Specifications:
MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
Processor: 2 GHz Quad-Core Intel Core i5
Memory: 16 GB 3733 MHz LPDDR4X
Graphics: Intel Iris Plus Graphics 1536 MB
OS: macOS Big Sur 11.3 Developer Beta 5

[peppy]

Likely related to #12323 and #12260. Underlying issue is likely that the game is not realising it's inactive when it should be (and will likely require an SDL fix as such).