It would be incredibly useful to be able to close open pop-ups in Home Assistant by pressing the ESC key instead of having to use the mouse to click close. I find that keyboard shortcuts are a really useful in my workflows, and this feature would save a lot of wrist pain!
An example where this is useful would be the “Adjust a Statistic” page in the dev tools. Where I find myself often navigating through multiple entities to fix erroneous values. Since I use a high resolution display, the mouse travel back and forth from the statistic shortcut, and the ‘close’ button is high.