Enable Wayland display server

[MartinBriza]

This PR makes the package able to connect to the Wayland display server in addition to Xorg. The biggest effect this has is that the application won't be blurry (or small) with high DPI scaling.

[flathubbot]

Started test build 55605

[nuttyartist]

Pinging @guihkx for feedback.

[flathubbot]

Build 55605 successful
To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/38262/io.github.nuttyartist.notes.flatpakref

[guihkx]

Wayland support was disabled on purpose by me because I honestly found the overall experience a bit inferior to running the app through XWayland.

But I hadn't experienced (or even thought about) HiDPI issues, so that might a good argument to enable it.

But before we merge this, can you please remove the now redundant --socket=x11 permission first? Thanks!

[guihkx]

@zjeffer just reported this new bug:

• Editing the Kanban board doesn't work on wayland nuttyartist/notes#617

Then perhaps we should postpone this change? Especially considering that the Kanban view is a paid feature, so we can't afford breaking it, in my opinion.