Back button should be disabled if possible

[derrell]

Since the gallery site is all one application, the use of the back button is inappropriate, and should therefore be disabled if possible.

[derrell]

Although it's an old posting, this probably still applies and gives a good indication of what should be done:

http://qooxdoo.org/documentation/0.8/back-button_and_bookmark_support

We need to identify actions in the Gallery that should cause a History entry to be added, so that the back button returns to the appropriate state of the Gallery when the back button is pressed.