- removed url encoding

- external login via ostep/UP now checks if firstName, lastName, mail chaned and updates it accordingly

- fixed missing navigation property for do exercise save files (TemplateFile) was probably not a problem because other path in ef core dependency graph

- external auth can now be easier accessed by an api by optionally returning the two auth tokens as json

# Conflicts:
#	src/ClientServer/Config/Constants.cs

- we are not longer compatible with the old ostepu, only with the new uebungsplattform

  - fixes issue where user could not compile in the do exercise when a hidden file was a dependency

- fixed issue where user registers (with password) and (maybe other) user logs in with studip -> password will not be reset

# Conflicts:
#	src/ClientServer/Config/Constants.cs