Major changes in 2.9.92 are:
* Avoid doing i/o to tree root nodes before they are used.
  This means we don't get authentication callbacks.
* Correct handling of startup notification
* Fix crashers in desktop icon context menus when unmounting volumes
* Make property page for home icon on desktop show the right size
* Prevent the progress dialog from displaying strange ETAs
* Make backspace key open parent folder in list view