I just found the "ship it" icon in the dashboard "..." option. I've been using review board for a while now, and didn't notice it until I saw a co- worker with some other icons. This could be changed to "More Columns" to make things easier. I know that takes up a lot of space, so you could bump the button to the previous row - shared with "All Incoming Review Requests".
We can't really roll it up with the titlebar, because the datagrid is a self-contained reusable component separate from the title. But we can maybe come up with something.
- Type-Defect + Type-Enhancement + Discoverability + Djblets + Component-Dashboard
Replaced it with the edit icon. Committed to master (9d3dc51)