Add a PassThrough filter.

Change-Id: I39a1c163a753533b20efc7418be9780b8b8d8637
Make it easier to subclass pqRecentFilesMenu.

Change-Id: Ia34b4eab46748dc129437e1a7b6dceb7558fe897
Merge topic 'lookup_table_cleanup' into next

7d6fd591 Make it easier to subclass pqRecentFilesMenu.
f68905cb Add a PassThrough filter.