Currently in the API, only pkg uploads and changes are supported. However the ability to upload or change icons is unavailable.

The reason this is important for us is we maintain over a dozen instances and the ability to programatically set icons for our items would drastically reduce the amount of work required for us to configure especially when we're deploying new items.

If possible, we'd greatly appreciate the following added to the API:
- Apps -> Create:
- New optional argument: icon.
- Sets icon during upload.
- Apps -> Update:
- New optional argument: icon.
- Replaces current icon.
- Apps -> List All (as well as Retrieve One):
- List "icon" property.
- If default/unconfigured, list None/missing
- If present, URL to icon if applicable