Fix for ghost displays on LG Ultrafine 5K #354

[jzimdars]

Repos I am interested in contributing to

aquamarine

What I want to contribute right now

Using an LG Ultrafine 5K over Thunderbolt with hyperland exposes ghost displays similar to what was addressed in #238 for the Apple Studio Display (which acts a lot like the LG). Unfortunately that fix is too conservative and leaves out the Ultrafine because it doesn't stitch the tiles at exactly the full 5K resolution. #354 recognizes when only one tile advertises it is standalone capable and drops the other(s).

Why the above bug / feature specifically?

Workspaces to get attached to the ghost display resulting in spaces that look usable but aren't and tiles moved to those "displays" get lost.

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]

That's fine. Welcome aboard! Make sure to follow the AI policy especially with AI-assisted code. It's a 2 minute read, and is especially important with aquamarine code as it's very delicate and easy to break.

For closed PRs, please open a new one :)