Add ability to create to-do from whiteboard object

In addition to being able to create an idea, feature, epic, etc from a whiteboard object, it would also be helpful to be able to create a to-do. When brainstorming, action items often arise that need to be assigned to specific individuals; it would be great to be able to create the to-do and assign it to the right person directly from the whiteboard. This would save the additional manual step of creating to-dos after the session.