Sidebar is overlapping content of file picker ("Save as" / "Open") #11875
Description
Describe the bug
The right sidebar is overlapping the content of the file picker ("Save as" / "Open" actions) if opened.
Steps to reproduce
- Open a text file
- Open the right sidebar
- From the context menu, click "Save as" or "Open"
Expected behavior
The sidebar should not be visible in the file picker.
Actual behavior
It's visible and overlapping all the content.