[W11] Borderless isn't actually borderless but is full screen (+ triggers Windows HDR / SDR switching bug)

[Memhave]

Description

Hi,

Just started playing and I noticed that the borderless mode isnt actually that. Its just full screen.

When I set the game to borderless fullscreeen, it will behave 100% like a full screen application - from the short black screen to the stupid W11 HDR bug, where it turns off HDR after alt tabbing / exiting from fullscreen applications (does not happen with borderless).

Expected Behaviour

Setting the client or game to borderless should set the window behaviour to a borderless window.

Actual Behaviour

Setting the client / game to borderless does not function and instead seems behave like a full sceen window.

Reproduction steps

1. Launch client / game
2. Alt tab either
3. Experience the classic about a second of black screen that fullscreen windows have when alt tabbing
   3.1 + other (usually) HDR bugs

Or:

1. Set game to borderless mode from fullscreen
2. Notice there is no difference in performance / behaviour as opposed to fullscreen windows

Other

A long term suggestion would also be to implement HDR (thats where the HDR bug comes from, switch SDR -> HDR etc).

Info on the HDR bug: https://answers.microsoft.com/en-us/windows/forum/all/hdr-monitor-low-brightness-after-exiting-full/999f7ee9-7ba3-4f9c-b812-bbeb9ff8dcc1