Draft: imprv: AdHocCommands: Display note type icon

This is pretty rough though, as the standard allows multiple notes per a <command> element, and those can have different types. Also, the performance could be better.

Should I maybe rework the UI so an icon is displayed adjacently to every note, instead of the common icon in the header? I suppose though the icon in the header should still remain there in a case there are no notes at all. And possibly it could also reflect the note with the highest severity, while adjacent icons reflect the types of individual notes.