Improve reset button behavior for custom samples

[Revisto]

Description

The reset button should have clearer behavior regarding custom samples.

Proposed Options

Consider adding a dialog or options when resetting:

• Reset pattern only – Clear the grid but keep custom samples
• Reset to defaults – Clear pattern AND restore default samples (remove user-added samples, reset MIDI mappings)

[inovaprog]

Hello! I'm new to the project and would like to work on this issue as my first contribution. Could you please assign it to me?

[Revisto]

Hi, sure. Honestly, this one needs a bit of design. I'm not entirely sure how I'd like to add it myself. We can discuss it here, you can take a look at how other GNOME Circle apps handle similar things in their UI, and then start coding.

[inovaprog]

Hi, I think we can just clarify the message in reset button and offer two options. Where "Clear Pattern" has the same behavior of Clear button and "Restore Default" just reset all. Like this:

[Revisto]

Great, I think we can start with that.

[inovaprog]

Sorry for the delayed reply — I missed this notification. I’ve implemented the approach in #120. Thanks!