Adds button to navigate to new quiz-now wall

Closes #188

See merge request arsnova/topic-cloud!98

merge 'tag-cloud-administration' into staging

See merge request arsnova/topic-cloud!96

Merge 'tag-cloud' into staging

See merge request arsnova/topic-cloud!97

Sometimes the tag cloud did a redraw unnecessarily
when joining the tag cloud via dialog.

[Ticket: #186]

Show gavel icon in participants room overview according to direct send setting

See merge request arsnova/topic-cloud!95

Show error message and navigate to home if user enters non existing room with direct link

See merge request arsnova/topic-cloud!94

Show correct message for all roles when sending comment which is not automatically published

See merge request arsnova/topic-cloud!93

Merge 'tag-cloud' into staging

See merge request arsnova/topic-cloud!92

Now when a creator enters a room,
he can see the message that the
room can be updated and thus
the keywords can be created automatically.

[Ticket: #183]

[Ticket: #184]

Merge 'tag-cloud' into 'stagig'

See merge request arsnova/topic-cloud!91

The room was not updated within the
administration service, so the
blacklist was not updated.

Merge 'tag-cloud' into 'staging'

Closes #180 and #176

See merge request arsnova/topic-cloud!90

Merge 'tag-cloud' into 'staging'

See merge request arsnova/topic-cloud!89

Also denied keywords with less than 2 character.

Merge 'tag-cloud' into 'staging'

See merge request arsnova/topic-cloud!88

Merge 'tag-cloud' into 'staging'

See merge request arsnova/topic-cloud!84