[BUG] UI does not respect system scaling (makes it unusable on high DPI monitor)

[Phoenix616]

Validations

• I have checked for similar bug reports and could not find any.
• I have tested and confirmed that this is an issue in an official branded build.

Describe the bug

When running the program on a monitor with a high DPI it will not respect the system UI scaling options so the UI gets displayed really small

Reproduction

1. (Optionally) Get a high DPI monitor
2. Set system window scaling to some none 100% value (e.g. 150%)
3. Notice the scale of the UI elements in Inochi Session doesn't change

System Architecture

x86_64

Operating System

Linux

Version

0.8.3

Logs

Nothing special really

Full log

[INFO] Inochi Session v0.8.3, args=[]
[INFO] Lua support initialized. (Statically linked for now)
[INFO] Scanning plugins at /home/themoep/.config/inochi-session/plugins...
[ERR ] webcam: Unexpected end of input when converting from type string to type uint
[INFO] Found zone webcam
[ERR ] Could not start texture sharing, it will be disabled. Is the library missing?
[INFO] Saving Virtual Space...
[INFO] Saving Zone webcam...

Additional Context

Running on Pop!_OS 22.04 LTS with the default Window Manager (so GNOME 42 based).

Ideally it would use the scaling of the system to set the UIScale option.

[Phoenix616]

Just noticed that there is a UIScale option in the settings.json. That at least makes it usable but should probably follow the system UI scale still. Adjusted the issue description accordingly.

[LunaTheFoxgirl]

Planning to fic with Inochi Session 0.9 with it's UI being entirely rewritten