There should be an option to display the filter pane on all document list screens including:
1) Quick search results in a workspace.
2) Saved search results
3) Recents lists
As well as the option to collapse it and not show it on:
4) Advanced search results
5) Cabinet-level quick search results.
Regardless of context, the filter screen should (a) be collapsable and (b) work exactly the same way.