Problem: I love the tray tabs, but sometimes when I quickly click over to a tab, I end up grabbing the tab and dragging it out of the tray pane. See GIF below. While it’s a convenient feature, the mishap occurs far more often than I edit my interface.
Solution: Add a feature to lock tray, or to lock the entire UI.
In this GIF, I accidentally grab the Materials tray tab and drag it out. (Note, the Entity Info window is intentionally popped out.)