- changed simple ace editor editor onChange debounce to throttle

- started about site

  - removed jquery dependency
- removed unused migration helper

- fixed issue where whenwe have no server connection opening the open exercises site we got redirected to the home site
  - this was because we couln't get the server msg for the left times... now we display a message and stay on the site
- added version string
- removed password migration helper because to internals/nocopy because this was temporarily anyway
- added not for creating/editing exercises that we need at least one code template

- pushed missing custom brace mode
- .ts files in static pages are now compiled before building

- changed login background img

- added some missing css/js files
- disabled webpack bundle analyzer (else we could not compile deploy)

- added all (past) icons
- added help text for subsequent editor
- removed old site side menu component
- added my assessment statistic to home site

- added favicon

- changed webpack deploy config to remove some modules (not used moment locales)
- webpack deploy config now uses minified versions and outputs the right dir structure for the backend
  - just copy all dist content to the wwwroot dir

  - empty pw is not longer allowed

  - pw migration (just hash pw like the backend)
  - ostepu user forwarding (auto create users when login in from ostepu, external login source)