"Remove Download" unavailable on folders

[i2h3]

This is an amendment to the "Always keep downloaded" feature.

Problem

As reported in a community thread in the forum, the materialized items in a folder cannot be evicted because the context menu action is missing.

Steps To Reproduce

1. "Always keep available offline" a folder
2. Wait for its content to materialize
3. "Allow automatic freeing up space" on that folder again
4. Wait for the pin decorations to disappear

Expected Behavior

1. "Remove Download" is offered in the context menu on the materialized folder

Actual Behavior

1. "Remove Download" is not offered in the context menu on the materialized folder but only on materialized files inside