Request Campaign - Drag & drop person into "Request Campaign" (just like "Add to List")

You may have noticed that you can drag and drop a person/group of people from a list/smart list view into a list in the left navigation and they will be added to the list. Essentially, it is a much more convenient and faster way to run a "Add to List" flow action for them:

It would be great if we had that same functionality for "Campaign is Requested: Source: Marketo Flow Action". You can view a list/smart list and click and drag and drop a person/group of people to the requested smart campaign in the left navigation and they will request the campaign.