Otherwise the auth/error-handling-interceptor will not kick in.

See: https://dev.to/angular/that-s-why-your-angular-errorinterceptor-may-not-work-5-seconds-fix-52m8

This have to be added be added to other modules as well I guess.

-> compiles but does not work properly

Make error-handling more consistent and expressive: In case of malformed serverUrl (like with missing trailing slash in docker-network) the error of type DOMException was swallowed completely.

Change routing /priv to /legal-notice

Change load message in index.html

Fix lost secondary boxes style (background)

Add a message for the case of files which can not be deleted because they where referenced by others.

A player referenced in a unit can not be deleted without deleting the unit. A Unit used in a booklet can not be deleted without deleting the booklet. A booklet used in a
Testtakers-File can not be deleted without that.

Map sucks

Background for body and secondary boxes

Scaffold edit settings feature in super user; re-arrange appConfig class

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/281

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/278

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/279

The API will send the appConfig as key value pairing, so we need some transform procedures. The getAppConfig function prepares for super user setting edit.

Move warning from card-header to alert tag; remove workaround via customTexts (system_announcement)

Application data on impressum page only

Logo flexible; move some main.dataservice infos into appConfig; new appConfig data: html, warning etc.

by giving systemAnnouncement a starting value

resolves https://github.com/iqb-berlin/testcenter-frontend/issues/247

closes https://github.com/iqb-berlin/testcenter-frontend/issues/282