Checklist

• I have searched the issue tracker for open issues that relate to the same feature, before opening a new one.
• This issue only relates to a single feature. I will open new issues for any other features.

Is your feature request related to a problem?

Adding Wayland support (-tags wayland) removes X11 support.

Is it possible to construct a solution with the existing API?

No response

Describe the solution you'd like to see.

Fyne apps built with Wayland support should try Wayland but fall back to X11 if Wayland is unavailable, so that a single binary is sufficient for one platform, regardless of the available display server.