auto-collapse in Tree
 

In Windows Explorer's tree, when you click on a folder, it auto-expands, then if you click on a sibling folder, the first folder collapses and the newly-clicked folder auto-expands. Note that the auto-collapse only occurs when clicking directly on the sibling folder and not the +/- sign next to it.

It would be nice to have an option similar to this in the UR Data Explorer, where it would auto-collapse siblings that were previously expanded as a result of the "single click expands tree" option when another sibling was single-clicked (and thus auto-expanded).