save input and output device

Within interpretation I can select the input and output device.

When I switch for example to the tab notes and then back to interpretation, the selection is gone and I need to select the input and output device again.

The chat for the BBB moderators is placed under interpretation. When I type a message and switch to another tab (for example to notes) and then back to interpretation, the message is gone. We should try to keep messages for the moderator chat within one session.