Looks like we can't reproduce the issue or there's a problem in the test case provided.
can't add docked item to viewport
I wanted to add a docked item to my viewport, but nothing is happening. This used to work with ST1.
My goal was to add more then one toolbar at the bottom. But the first one isn't even showing... Anyone any idea how to fix this problem?
dockedItems is deprecated... all items, docked or not, should go in the items array and use the docked config on your docked items.