Unable to rename or delete sketch tabs

[sstaub]

Describe the bug
I can create a Tab but I can't rename or delete it. The items in the menu are grayed out.
Edit: This is possible in the file manager,

To Reproduce
Steps to reproduce the behavior:

1. Open the IDE
2. Create a new Tab
3. It is not possible to delete or rename it

Expected behavior
Allow deleting and renaming the sketch file tabs.

Screenshots

Desktop (please complete the following information):

• OS: macOS
• Version: Big Sur 11.5.1

[per1234]

Closing as fixed by #528