COMP: Increase timeout for TestPickingManagerSeedWidget

TestPickingManagerSeedWidget needs more than 20 seconds on Ubuntu, so
increase to max of all VTK builds

Change-Id: I348fa767bdf861bb187575f959e265cabb379bdd
Merge topic 'Timeout_TestPickingManagerSeedWidget' into master

a672c4f9 COMP: Increase timeout for TestPickingManagerSeedWidget