- some small asset dialog improvements

- added download for custom project description assets, exercise editor description assets

- moved some asset related files

- fixed issue where after custom tests cannot be rerun after promise was rejected
- fixed issue where users could not show custom test content after release finished

- markdown guide supported syntax highlighted languages are now sorted
- download test file has now other icon (in exercise editor)

  - do exercise site
  - exercise editor
  - tutor view
- fixed pdf as task description issues
- edit user dialog now displays the user id
- disabled exercis import, because the asset file storage change

- started about site

  - removed jquery dependency
- removed unused migration helper

- added copy and lang display to markdown fenced code blocks
- added some meta tags

- we now display the exercise owner in overviews

- fixed issue #22 where the group role permission (canLockExercisePermanently) was not applied in ui

- removed IsPermanentlyLocked sorting in exercise overviews because not working in backend (some ef weird error)  - for issue #22

  - we disabled everything related to the exercise when the exercise is permanently locked
- TODO sorting in the exercise overviews by isPermanentlyLocked is not working

- TODO apply the readonly state in the frontend (disable controls)

- test settings view can now scroll

- removed old feedback field

- creat release working time in im field is now full with

  - changed UserGroup types