Can DartPad show some indication that the code is being run?

[bt1159]

Currently, after I press the "Run" button, I get a brief pop-up explaining that the code is compiling. After that disappears, the screen goes back to looking exactly as it does before pressing the "Run" button until the code is completed (at least, I assume it is waiting for the code to be completed). Then, all the console output is displayed.

I don't mind waiting for the console output until after the code is complete, but it would be nice to have some visual indication that DartPad is working in the background.

This has been on my mind before, but currently I am trying to test a few different approaches to working with large(ish) collections. So, my code intentionally takes a good while to complete. While it is doing so, it just feels strange that I do not see any sort of feedback telling me so.