* Add caching of user-data for 600 seconds
* Make cache-entry interface commonly usable
* Extract revision types
* Remove revision-cache rule
* Use seconds as cache-time interval (Date.now uses milliseconds)
* Fix import error
* Extract cache logic into common cache-class
* Add cache class that was forgotten to commit in last commit
* Start adding unit tests
* Fix bug detected during unit-testing
* Add unit tests for cache
* Made entry-limit test more explicit
* Renamed files to lower-case starting letter
* Add mock files
Note that revisions-list needs to be called revisions in the reality to be confirm with the API spec, but our mocking solution doesn't allow that...
* Add revisions API calls
* Fix line endings in mock files
* Extend CommonModal to accept size and additionalClasses
* Clarify variable name in API request
* Add react-diff-viewer as dependency
* Add revision chooser modal
* Fix type of route params
* Added and updated mock files
* Added user-icon list per revision
* Added translation to alt text of avatars
* Updated mock file to remove inconsistencies
* Add caching for revisions
* Sort mock file revisions-list descending by timestamp
* Pre-select first/newest revision on first modal open
* Regenerated yarn.lock file from scratch
* Applied requested changes in variable names and line lengths
* User UserAvatar component instead of manually set image
* Move revision-modal-list-entry to own component
* Removed unnecessary return statements
