Collection tree state should persist on refresh

[mark-dce]

BUG After I click on + and expand one or more nodes of my collection tree (personal or course collections) and then do anything that refreshes the screen, the collection tree collapses.

ACCEPTANCE

• [ ] When I expand nodes in the tree and refresh my browser, the same nodes should remain visible
• [ ] When I reorder the tree and click Save the order, the tree should not collapse
• [ ] When I do a search, the tree should keep the state of displayed nodes

[acozine]

We cannot control this while offering multiple tabs and multiple pages.