UI unresponsive when deleting a non empty folder

While deleting a folder that is NONEMPTY the system will become unresponsive and hang on the dialog that prompts for confirmation of the deletion. This does not occur if the folder is empty.

Preconditions: a nested structure of folders where at least one subfolder contains at least one document. It can be a new root folder, for example:

root
_fldr1
_subfldr1
_document
_subfldr2
_document
_fldr2
_subfldr1

Steps: click on the element named 'root' to trigger the menu and select Delete folder... A dialog appears prompting for confirmation. Choose OK.

Results:

• exp: the corresponding action is carried on and the dialog is dismissed. The document tree is refreshed accordingly and does not present the just deleted directories anymore.
• act: the dialog stays in place and cannot be dismissed with the help of the Cancel button. Pressing either OK or Cancel has no effect. The only possible action is to click the [x] in the upper right corner of that dialog. It is possible that the rest of the UI hangs as well in which case one can use F5 to restablish proper expect UI behavior (after the dialog box is gone) and verify that the elements have actually been removed as intended.

Note: this happens no matter the state of the included files: Live or Offline. The fact that Live documents are thus being deleted is another issue.