Playback cursor and playhead do not update properly under Wayland.

[generic-pers0n]

Describe the bug
On Linux, under Wayland, the playback cursor and playhead do not update properly under Wayland. It is possible

To Reproduce
Steps to reproduce the behavior:

1. Start Saucedacity under a Wayland session.
2. Open an audio file or project, or record some audio
3. If opening a file: Press play. If recording: see 4.
4. Observe that both the playhead and playback cursor do not update

Expected behavior
Both the playhead and playback cursor should update as normal.

Screenshots
N/A.

Additional information (please complete the following information):

• OS: Linux
  • Tested on Pop!_OS 22.04 under COSMIC Wayland on an NVidia GPU and latest Arch Linux system on an AMD GPU.
• Version: Latest Saucedacity 1.2 development version.

Additional context
This issue was discovered and confirmed rather late, so it will not be fixed in time for Saucedacity 1.2 stable. (At least, this is most likely, but there is always a possible chance).