I am loving the new tab-style window switching interface in Revit 2019. However, one thing that limits its usefulness is the proliferation of open section views as I work in Revit. I find that I never navigate to a working section view directly, I always right-click on the section on my floorplan to access the view. It would be really handy to have a button which automatically closes all un-referenced sections currently open. I bet it wouldn't take very long to program and it would be a real time saver.