Revert changes to OnScreenKeyboardOverlapsGameWindow on iOS

[frenzibyte]

• Reverts part of Disable OnScreenKeyboardOverlapsGameWindow on iOS when hardware keyboard is attached #6407
• Keeps the override in SDLGameHost as-is, as I think it's still good for any case of running the game on a 3-in-1 laptop with keyboard detached (assuming windows will slide up a software keyboard on any request of text input).

This introduced horrible UX in reality, contrary to what I thought and have seen when I added this. It seems I have not tested this enough back then.

While the on-sceren keyboard hides when a hardware keyboard is connected, it can be brought back, and once it's back, it does not hide again until the user explicitly hides it again.

This introduces very weird / ugly behaviour when combined with a FocusedTextBox on osu!, e.g.:

ScreenRecording_01-25-2025.23-13-08_1.MP4

(after I brought back the on-screen keyboard, I began tapping on empty spots in the settings overlay, causing the keyboard to slide down, and then slide back up due to the logic of FocusedTextBox)

[peppy]

it can be brought back, and once it's back, it does not hide again until the user explicitly hides it again.

brought back how?

[peppy]

🤷‍♂️

[frenzibyte]

it can be brought back, and once it's back, it does not hide again until the user explicitly hides it again.

brought back how?

CleanShot.2025-01-26.at.02.00.25.mp4

[peppy]

Not sure this is so bad but ok