Topic: Help modifying a script

I'm making some small modifications (adjusting the UI size to 1 wider column instead of 2 short ones) to the script found on this forum post, but I have a problem. The "save changes" button on the new UI doesn't work and nothing I do seems to fix it.

My understanding of scripting is bare minimum (The UI adjustment took long enough), can anyone help me with this? The script has to have worked on the site at one point, I don't know what could have changed.

Updated