Characters sent via Linux compose key are not processed

[64kramsystem]

Bug Description

Characters sent via Linux compose key are not processed.

When trying to compose one, I hear the error bell, and the character is not composed/sent on the remote side.

This is independent of the keyboard mode (I've tried both map and translate).

How to Reproduce

Assuming that:

• both client and remote side are Linux
• the compose key is Caps lock
• trying to compose ä

The steps are (on a connected):

1. tap Caps lock
2. tap a
3. the compose sequence is initiated (an underscore cursor will display)
4. tap "
5. the error bell will ring (probably this is on the client side), and the compose sequence is cancelled

Expected Behavior

On point (5), the character ä should be sent.

Operating system(s) on local side and remote side

Ubuntu -> Ubuntu

RustDesk Version(s) on local side and remote side

1.2.3 -> 1.2.3

Screenshots

(none)

Additional Context

No response

[rustdesk]

tracked by #4367