[MRG] ENH: change 'Delete all drives' button color to red for better UX

[m-ahmad-amin]

This PR updates the “Delete all drives” button in the HNN GUI to red, making its destructive action more visually noticeable. The change improves user experience by aligning with intuitive UI conventions.
GSoC 2026:
This PR is submitted as part of the GSoC 2026 exam. Maintainers, could you please add the gsoc-2026 label?

[asoplata]

Thanks for your PR Muhammad! I'm temporarily changing this to "blocked", since it is best if this change is made after we merge in #1243 , which we expect to do next week if we can. After that, this PR will have to be rebased onto master and the implementation may have to change. Also thanks for your interest in GSoC!

[m-ahmad-amin]

Thanks for the clarification!
While this PR is blocked on #1243, please let me know if there’s anything else I could work on in the meantime that would be helpful or relevant for the GSoC projects. I’d be happy to contribute.

[asoplata]

Sorry for the wait Muhammad, I have merged #1243 so now, please rebase your changes onto the latest commit of master. You can find some advice on how rebasing generally works here https://jonescompneurolab.github.io/hnn-core/stable/contributing.html#keeping-your-code-up-to-date-by-rebasing .

[m-ahmad-amin]

I have rebased my changes onto the latest commit master. Let me know if there's anything else I can help with?

[asoplata]

Thanks Muhammad. Instead of passing a custom color to create_expanded_button, please change the "delete all drives" button so that it is built similarly to delete_button in the function add_drive_widget.

Also, if you're willing, it would be helpful to replace all uses of create_expanded_button with an equivalent Button widget call by itself, and then remove the function. Now that we've heavily refactored the GUI create_expanded_button is not really needed anymore and only adds confusion.

[m-ahmad-amin]

I have refactored delete all drives button and now it is built similarly to the delete_button in the function add_drive_widget.
Thank you for trusting me for the second task of replacing all uses of create_expanded_button with an equivalent Button widget. I plan to do this in a separate branch and PR so it can be reviewed independently.

Could you please let me know how can I contact you regarding GSoC-related questions? I want to make sure I follow the preferred channel.

[asoplata]

Hello Muhammad, please do the second task inside this PR instead of creating a new one. These are small changes and it will be easier for me to review them all at once.

For GSOC questions, if you have general questions, feel free to ask them in the GSOC category of our Discussions page https://github.com/jonescompneurolab/hnn-core/discussions/categories/gsoc , or on this issue here #1202 , or on our gitter (available here https://github.com/jonescompneurolab/hnn-core ).

If you have specific questions about your proposal itself, then unfortunately this year we are not offering feedback on proposals before submission, in the interest of fairness to all participants.

[m-ahmad-amin]

As you suggested I have replaced all uses of create_expanded_button with Button widget inside this PR. Please let me know if any further adjustments are needed.

[asoplata]

Please replace the icon used with the same as that of the individual Drive's icon.

[asoplata]

Thanks Muhammad - there's only a couple of small changes left to do, but after that we should be ready for merge! Thank you for your time.

[m-ahmad-amin]

Thanks for the guidance! I’ve applied the remaining requested changes.
Please let me know if anything else needs adjustment.