Add button pulls you out of corkboard mode[FIXED]

To reproduce:

  1. go to corkboard mode, highlight an existing document/index card
  2. click the add button
  3. You are pulled into a new text document, not a new index card on the corkboard.

This behavior is different from what happens if no card is selected when you click the add button. In that case, it creates a new card, exactly as I want it to.