Align 3D stuck super wide for some reason, even though the screenshots show it smaller. Window responsiveness settings must have changed between CC 2017 and now? This screenshot is how small it will get before things start getting cut off.
EDIT: Since posting this, I was able to shrink it, but I had to reopen the window, then resize, then dock. If you just dock it, it will not let you adjust the width. Not sure why it behaves this way.