Merge branch 'sqlCheckerIntegration' of gitlab.informatik.uni-halle.de:Syndrom/frontend-react into sqlCheckerIntegration

- fixed issue where the ui did not properly disabled add custom test button even if the exercise settings disallowed creating custom tests

- added check for first login page (set password) to ensure there is an tid

- moved files that should only be copied to separate folder (just_copy)

- added small check if localstorage throws

- fixed issue #139 - sometimes the initial ace session was not properly overwritten in the tutor view (feedback editor)

- fixed annoying flickering when running tests and the list of tests gets more height and shows a jumping scrollbar

- fixed issue where in the tutor view the save button was not properly disabled when there was no assessment to update
  - this is possible with the new hasAssessment property of assessmentFullBase
- we now also disable all assessment related inputs when there is no assessment

- fixed isse where we can't save/update a custom project after creation because the component was not re-mounted (and no new ids are loaded)

  - for more information see #139
- fixed some typos

- regex + use diff option now works together as expected
- missing output is now displayed properly (text: missing)

- fixed typo

- fixed issue where the simple ace editor sometimes not applied the editor settings (e.g. after all data was loaded)
- increased default editor font size to 13

- adjusted link colors in login overlay
- added items to about site timeline
- added small egg

- changed about site (now external site)
- added additional safety chech before deleting old users (activated users)
- disabled old about site (removed link but router is still active for it)

  - added auto scroll disable

- fixed issue where in the site menu hovering over icons will show hover but clicking will not hide the site menu

- tweaked 404 chat (timings)

- switched from 404 recursive to iterative chat

- changed simple ace editor editor onChange debounce to throttle