I just discovered the Settings panel in the AGOL / Enterprise Arcade Expression Editor (Ctrl + ,). I love that I actually have the option of changing the theme to something consistent with the rest of my development tools.

Is there any way that my settings can be persistent? As it is, I've got to open that panel every time I'm editing an expression. The theme is one thing, but there are actually a few settings in there that I would like to change more or less permanently.