(cherry picked from commit ac7f33a1)

(cherry picked from commit 51057a47)

(cherry picked from commit eff291df)

(cherry picked from commit 5f4d5cc3)

(cherry picked from commit 1da64d4d)

(cherry picked from commit 128b6442)

(cherry picked from commit 599d38de)

(cherry picked from commit 50cf89c0)

(cherry picked from commit f6d12f2a)

(cherry picked from commit 8d26844d)

(cherry picked from commit 38d6d713)

Closes #1843

Merge request studip/studip!1212