Fix browser back button navigation from Compare

After performing two separate Document comparisons using the Compare RESULTS_SELECTION_ACTION, attempting to return to the previous Document selection screen using the back button causes another Document comparison to be loaded using Documents previously selected. The Folderish from which the Documents were selected can only be navigated to by opening a new tab/window.

Steps to Reproduce:

1. Create / navigate to a Folderish containing at least four different Documents.
2. Select the first and second Documents among its contents and execute the Compare action.
3. After loading the Compare, click the Browser back button to return to the Folderish view tab.
4. Select the third and fourth Documents and execute another Compare..
5. After loading the Compare, click the Browser back button.

Expected result: the window navigates back to the Folderish view tab.

Actual result: Document comparisons continue to be loaded in the following repeating order:

• 2nd vs. 3rd documents
• 4th vs. 2nd documents
• 3rd vs. 4th documents