Can you please put an ‘Apply’ button on the screen and make it non-modal? It is a major PITA trying to debug an expression or the interaction between an expression and a global script when you have to close the window after ever change. It gets worse it there is an error in the expression because then you can’t close the window to open another (working) expression to compare.
Same goes for Action Configuration screen. Except it has an Apply button but it’s wasted cause you can’t do anything to test the new code until you close the window