Limitation: Pin multiple select feature does not allow for unpin multiple items

**Describe the bug**
This is quite unexpected, why is it not allowed to select multiple pins and unpin them?

**To Reproduce**
Steps to reproduce the behavior:
1. select multiple pins
2. there's no button to unpin them all

**Expected behavior**
A button to unpin would allow to unpin all pins selected in one operation.

**Desktop (please complete the following information):**
- OS: Linux
- Browser chrome
- Version 79