am 33e56003: am 446d0fb6: am 41a12d22: When closing a folder, make sure to remove it from the list of drop targets.

Merge commit '33e56003fe3ab987079b9b9f8b0d39be7d427b09'

* commit '33e56003fe3ab987079b9b9f8b0d39be7d427b09':
  When closing a folder, make sure to remove it from the list of drop targets.