add number to questions in questionwall

Closes #553

See merge request arsnova/frag.jetzt!564

Merge branch '451-show-the-up-votes-and-the-down-votes-in-the-tooltip-for-the-rating' into 'staging'

add up and downvotes for lecturer as tooltip

Closes #451

See merge request arsnova/frag.jetzt!568

Resolve "Implement a WYSIWYG Editor"

Closes #561

See merge request arsnova/frag.jetzt!566

Merge remote-tracking branch 'origin/561-implement-a-wysiwyg-editor' into 561-implement-a-wysiwyg-editor

With the new quill format, some cleanups and
unnecessary double checks are no longer required.
This leads to a much better performance.

[Ticket: #613]

After the marks have been added,
the only thing missing is Katex.
Katex must be implemented in a different way,
because the html data has to be enclosed
by a Quill container.

A partial commit to the upcoming meeting.

Resolve "After entering a new question scroll to it in the question list"

Closes #487

See merge request arsnova/frag.jetzt!565

With the new directive, this function
can be implemented.

[Ticket: #487]

remove box shadow from active user counter

Closes #244

See merge request arsnova/topic-cloud!148

remove api in path

Closes #248

See merge request arsnova/topic-cloud!149

Adds more responsive layout for mobile users and disables go to question...

Closes #242 and #240

See merge request arsnova/topic-cloud!147

Adds more responsive layout for mobile users and disables go to question button when no valid token has been entered

Adds click event to validator field

Closes #239

See merge request arsnova/topic-cloud!146