Wrong text at radio botton "Inherit from parent material" when uploading 2nd resource of material type in restricted event

[s.hesselbach]

Use case: material is to be uploaded to restricted event.

When first resource of matrial type (e.g. slides) is uploaded everything is fine. The text at the first radio button says:
"Inherit from parent Conference (currently restricted to some users, but can change)"
See

However if second (or further) resource is uploaded it says:
"Inherit from parent material type "Slides" (currently open to everyone, but can change)",
despite the fact that the matrial type Slides here is protected because it inherits from a protected event.
See

[jdafflon]

Fix: ​https://github.com/jacquesd/indico/commit/b281d87bb765362db430abe592955ee51fc87e2d