Re: Change size the form component on the Edit Metadata page
The edit metadata form has a fixed size unfortunately without any configuration option. The only way to override it would be to load a custom CSS file to override the default layout rules.
You might be better off trying to shorten the value. I cannot believe that having such a long value is actually required, and I am also apprehensive of various other things in the UI that the value would "break" if it were displayed in those places.