Zeige aussortierte Sprachen grau in der Sprachauswahl an

Closes #65

See merge request clients/wechange/bbb-livetranslation!17

Merge branch '63-make-muted-unmuted-state-of-the-translation-mic-more-obvious' into 'feature/translation-2.2.31'

Resolve "make muted/unmuted state of the translation mic more obvious"

Closes #63

See merge request clients/wechange/bbb-livetranslation!16

Merge branch 'feature/show_connection_state_in_language_selection' into 'feature/translation-2.2.31'

Zeige Verbindungsstatus im Spracheinauswahldialog

See merge request clients/wechange/bbb-livetranslation!15

Symbols can configured by internationalization library as utf-8 icons.
Currently the symbols only defined in code as standart message.

Neurendern bei Stummschalten oder Entstummen des Übersetzers

See merge request clients/wechange/bbb-livetranslation!14

Floor und Übersetzungsspur verwenden das selbe Mikrophones

See merge request clients/wechange/bbb-livetranslation!13

Sprachauswahlen markieren Standartsprache mit harken

See merge request clients/wechange/bbb-livetranslation!11

Floor Laustärkeverzögerung ist unendlich

See merge request clients/wechange/bbb-livetranslation!12

If the translator is not speaking state is refreshing the timestamp is refreshing, too.
The timestamp is used for the floor volume delay.
After the translator is not anymore speaking, fairblue will wait some time before floor volume is raising back to normal.