Clipboard content sharing not working after switch to 'Full Graphics' display mode

**Describe the issue**
Copy-and-paste clipboard content sharing is not working when 'Full Graphics' display mode (under Display tab) is selected. It is working when 'Console Only' display mode is selected. Clipboard sharing was enabled in Sharing tab and the SPICE guest additions were installed.

**Configuration**
* UTM Version: 2.2.4
* OS Version: macOS 11.6
* Intel or Apple Silicon? Apple M1
* Guest OS: Debian 10 ARM (minimal)

**Debug log**
[debug.log](https://github.com/utmapp/UTM/files/7290404/debug.log)