Don't allow editing a variable in debug view if it's not editable

[david-fong]

Feature Request

The Debug View's Variables view allows double-clicking to open an editable field to edit the variable. But it allows it even when the variable is not editable. If you try to submit an assignment to such a variable, you get "-var-assign: Variable object is not editable". Maybe this is queryable with -var-show-attributes?

[github-actions]

Thank you for your feature request. While we may not be able to implement it immediately, we will monitor community reactions to see how it fits into our backlog. Additionally, if you're working with GDB/LLDB, please note that the code is open source at https://github.com/microsoft/MIEngine/wiki/Contributing-Code . Your contributions are always welcome and appreciated.