Allow or prevent session name with accent letters

[Giuncan]

Right now, session name can contains only alphanumeric characters and space and underscore are allowed. Indeed, extra characters are blocked and you obtain this message in the logger.
Invalid display name: only alphanumeric plus underscore plus space characters are allowed for a maximum of 16 characters

However, you can insert a session name with accent letters (e.g. Ciaò). You obtain an error in the logger:

2024-03-05 17:22:08,470 [ERROR:RCM.gui] [Dummy-20 ] [worker.py:run:91]-->Exception: 'ascii' codec can't decode byte 0xc3 in position 3: ordinal not in range(128) - Traceback (most recent call last): File "client\gui\worker.py", line 76, in run File "client\logic\manager.py", line 196, in new File "rcm.py", line 70, in __init__ UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 3: ordinal not in range(128) 

but you can continue with the VNC session.

The next time you open a new connection on the same server, you get the following errors:

2024-03-05 17:31:34,302 [ERROR:RCM.gui] [Dummy-4 ] [thread.py:run:80]-->Failed to reload the display sessions
2024-03-05 17:31:34,302 [ERROR:RCM.gui] [Dummy-4 ] [thread.py:run:81]-->'ascii' codec can't decode byte 0xc3 in position 3: ordinal not in range(128)
2024-03-05 17:31:34,302 [ERROR:RCM.gui] [Dummy-4 ] [thread.py:run:83]-->Exception occurred Traceback (most recent call last): File "client\gui\thread.py", line 78, in run File "client\logic\manager.py", line 150, in list File "rcm.py", line 129, in __init__ UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 3: ordinal not in range(128)

and you can not view any session.