Reset theme selection dropdown UI when deleting active profile

[Kirtan-pc]

Description

When a user deletes a theme profile that is currently loaded, the visualizer settings revert to default fallback values, but the active dropdown selection and text input fields do not reset, leaving the deleted profile's name selected.

Steps to Reproduce

1. Create a custom theme profile called "MyCustomTheme" and load it.
2. Choose "MyCustomTheme" in the dropdown list and click "Delete".
3. Check the dropdown selection and text input.

Expected Behaviour

Deleting the currently active theme profile should reset the dropdown selection to the default state and clear the profile name input field.

Actual Behaviour

The deleted profile name remains selected in the dropdown list and text input field.

[github-actions]

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[Kirtan-pc]

Hi @SamXop123 ,

I would like to work on this issue under GSSoC 2026.

Could you please assign this issue to me?

Thank you!