I agree with your suggestions. Still, being able to resize this window would be handy. (If this is possible).
So, if I understood everything correctly, then, taking into account my idea and your new suggestions, this window may look like this:
The top button is clickable and indicates the path to the folder of the script selected in the list. When you click on this button, you can open the folder with the script.
But if all scripts are in the client's root folder or if the string turns out to be too long, then reasonable limit yourself to indicating such a path "..\mIRC\scripts\
" for to shorten the string.
By the way, the same could be applied to the popup "Scripts Editor/View/More Files
", when searching for scripts that are not included in a too long list.