[FEATURE] choice of keyboard for rdp

[rdrouche]

Describe the feature:

Possibility to configure the keyboard layout when configuring the connection as on Guacamole, because in qwerty with an azerty keyboard it's not great

Describe why this feature is needed:

For all people :)

Scope of feature:

• [ ] TRASA codebase
• [ ] dashboard
• [ *] server
• [ ] mobile app
• [ ] browser extension
• [ ] device agent
• [ ] website/docs