[Feature Request]: Show some indicator that canceling a workflow is in progress

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

Currently when you cancel a workflow, it just hangs and it is unclear if it will be cancelled or not. Please add a "Cancelling" or some kind of indicator to show that the workflow is being cancelled.

https://github.com/user-attachments/assets/637e2561-d966-41be-971e-25b9e3c77d9e

### Proposed workflow

1. Queue up a workflow
2. Right click on the workflow in Queue and click "Delete workflow"
3. See that the workflow was cancelled

### Additional information

_No response_