Description
I'd like to hide the blue popup note icon that appears in the corner of shapes when a popup note is added:
The issue is that the note icon overlaps the label, so I'd like to hide it. I also have a lot of comments, so the diagram feels cluttered with all of the note icons.
Feature proposal
Add an option called "Hide popup note icon" when creating popup notes. This would align with the "Hide link icon" when adding links and "Show icon in viewer" when adding dynamic layer toggles.
Implementation
Add a `renderIcon` option for the `PopupNote` graphic type in the gliffy format, e.g.:
```
"type": "PopupNote",
"PopupNote": {
"text": "note",
"renderIcon": true/false
}
```
This would align with the current implementation of the `link` graphic type.
