Features:
* Adds a counter for the comments
* Adds a badge in the comment view that counts comments / filtered comments
* Adds a guest login for speaker role

Performance improvements:
* Enables Angular Ahead-of-Time compiler
* Improves loading strategy for Service Workers

General improvements:
* Optimizes dark theme for better readability
* Only shows the toolbar for the comments when there are more than 3 comments
* Pins the searchbar for the comments to the top
* Adds ID and local time to the header component in the comment view
* Improves overall wording

Bug Fixes:
* Closes presentation view for comments on pressing ESC when in browser fullscreen
* Fixed not being able to scoll in room settings

Move WAI and Performance Analysis to a later release

Ux fixes

Closes #310

See merge request arsnova/arsnova-lite!276

Fix async handling and if-else

Closes #313

See merge request arsnova/arsnova-lite!275

Update en.json

See merge request arsnova/arsnova-lite!274

Update de.json

See merge request arsnova/arsnova-lite!273

Update en.json

See merge request arsnova/arsnova-lite!271

Update de.json

See merge request arsnova/arsnova-lite!272

Fix registering sw

See merge request arsnova/arsnova-lite!270

Reenable aot

Closes #181

See merge request arsnova/arsnova-lite!266

Room page comment counter

Closes #289

See merge request arsnova/arsnova-lite!268

Fix alot of stuff

Closes #311, #306, and #300

See merge request arsnova/arsnova-lite!267

Disable stomp debug output in production

See merge request arsnova/arsnova-lite!269

This is because of a bug in the angular-cli.
May hopefully be resolved so this commit can be reverted.

Based on arsnova-comment-service commit
  b88aa32c54ba773373b817d36313787ae895e809

Refactor participant room page to use base class

Also check for when the user presses esc on fullscreen initiated by the app

Resolve "Ready for EDULEARN"

Closes #308, #304, and #303

See merge request arsnova/arsnova-lite!265