Qt designer does not autosave (when docked)

With the new docked Qt designer you kind of expect any changes to be autosaved when starting a build. This is the behaviour for code so really it should also be that case for qt designer. Maybe it should be an option. 

From a workflow perspective previously with designer running as a separate app you see it on the taskbar and are more likely to remember that you need to save your changes.

Now it is docked (by default - I know you can change that) it is all too easy to treat it as any other code editor. You don't see it in the taskbar. The net result is you forget to save!

I think I have started builds dozens of times now without remembering to save designer changes first.

An autosave option would make life easier here and save us from these time wasting accidents!