[Bug]: No way to remove all custom views

[vmalyk]

Expected behavior

Should be saved and remove all items

Actual behavior

If you remove all items and click "Save" - nothing happened and if check console you see error:

Steps to reproduce

1. Open "Perspectives / Views"
2. Click to "View Editor"
3. Choose each custom view that present in right panel and choose "Delete" in right-click menu
4. Click "Save"
5. Check console or reload tab - custom views still present.