Ensure input method popups are rendered above overlay layers

[shinnkka]

Repos I am interested in contributing to

hyprland

What I want to contribute right now

Ensure IME popups are always showed above Overlay layer.

Why the above bug / feature specifically?

Any Overlay application can not access IME.

I acknowledge that:

• I have read the AI Usage Policy and agree to follow it.

• I have read the Code of Conduct and agree to follow it.

• I wrote this request with my own hands, my own keyboard, and in my own words.

[vaxerski]

I am gonna close this. Your MR is incomplete (it only solves one of the problems, not all other) and I'll make a MR to properly fix it.