Uncheck control origination boxes to match opencontrol data

[jcscottiii]

After #44 is merged, we will have a way to fill the checkboxes according to the data from opencontrol.
However, we need to determine the logic for when we should uncheck boxes according to the opencontrol data.

@afeld had a great suggestion where we have two scenarios:

1. We have at least one box filled in the opencontrol data, then we uncheck the other boxes
2. If there's no control origin data at all for that control, we leave everything in the doc the same.

[brittag]

I'm not totally sure if this is relevant for this task, but good to note that sometimes having several boxes checked (including ones that seem contradictory) is correct. :)