Support material symbols icons and custom paths for icons on Loaders and Creators

[BigRoy]

Is there an existing issue for this?

• I have searched the existing issues.

Please describe the feature you have in mind and explain what the current shortcomings are?

The Launcher Actions in tray launcher allow to set an icon from more icon libraries than just font-awesome that the Loader and Creator support, using e.g.:

icon = {
        "type": "material-symbols",
        "name": "ulna_radius_alt",
        "color": "#FFA500"
    }

How would you imagine the implementation of the feature?

Support custom icon paths and more icon libraries for Loaders and Creators, similar to the Launcher Actions.

Are there any labels you wish to add?

• I have added the relevant labels to the enhancement request.

Describe alternatives you've considered:

No response

Additional context:

No response