Merge branch '495-the-audio-guide-prevents-you-from-entering-numbers-that-are-assigned-to-it' into 'master'

Fix audio guide interferes with text area

Closes #495

See merge request arsnova/frag.jetzt!450

Merge branch '485-error-message-for-audio-guide-when-there-are-not-enough-questions-to-filter-sort' into 'master'

Add error message to audio guide when trying to use filter/sort and number of questions < 3

Closes #485

See merge request arsnova/frag.jetzt!449

Fix spelling mistake on participant/room

Closes #497

See merge request arsnova/frag.jetzt!448

Merge branch '475-audio-guide-can-access-session-code-textfield-without-closing-privacy-dialog' into 'master'

Resolve "Audio Guide can access session code textfield without closing privacy dialog"

Closes #475

See merge request arsnova/frag.jetzt!447

Fix language defaults to browser language on reload

Closes #496

See merge request arsnova/frag.jetzt!446

Merge branch '476-wrong-pronunciation-of-session-code-for-the-english-version-of-frag-jetzt-with-the-audio-guide' into 'master'

Added english translation for session-name/code

Closes #476

See merge request arsnova/frag.jetzt!445

Recover tags when closing dialog via backdrop click

Closes #465

See merge request arsnova/frag.jetzt!444

Also stop using reference of local room variable tags so that they will be not overriden after closing dialog with 'abort'-action.