"Shared via"-indicator does not work properly with links

[JammingBen]

Steps to reproduce

1. Create a folder including files
2. Create a public link for this folder

Expected behaviour

• When opening the sidebar for this folder: Shared via indicator is displayed but empty:
  

• When opening the sidebar for one of the files inside the folder: Shared via indicator is missing
  

Actual behaviour

• When opening the sidebar for this folder: Shared via indicator should not be displayed in the details
• When opening the sidebar for one of the files inside the folder: Shared via indicator should be displayed in the details