Add select menu on creating a comment
Add small section in comment mat card for displaying the comments

Refactor init of custom icons into a separate service

Enable tags per default on room creation and add default tags.
Refactor comment extension settings.

Resolve "Redesign demo page"

Closes #213

See merge request arsnova/frag.jetzt!207

Show room filter above 3 entries

Closes #206

See merge request arsnova/frag.jetzt!206

Add a header text to the start screen

Closes #211

See merge request arsnova/frag.jetzt!204

Resolve "Rework Slider"

Closes #209

See merge request arsnova/frag.jetzt!203

set inital focus to cookie dialog

Closes #118

See merge request arsnova/frag.jetzt!202

Resolve "Offer the transcript of the demo video in an accessible manner"

Closes #166

See merge request arsnova/frag.jetzt!200

Resolve "Adjust the design of the buttons"

Closes #207

See merge request arsnova/frag.jetzt!199

# Conflicts:
#   src/app/components/home/_dialogs/demo-video/demo-video.component.scss
#   src/styles.scss