Linux Input Capture does not release keys when transitioning to other machine

[Jacoby6000]

Using linux as the server with input-capture-portal, lan-mouse will never send the signal to release keys after moving the mouse to another machine.

Reproduction:

• Open up a text editor or something
• Hold down a key, like the 'A' key
• While holding the key, move the mouse to another system's monitor
• Release the key
• Observe that the key continues to repeat despite being released

This can get annoying with modifier keys being accidentally held while transitioning