1. If you have no group categories yet, and you fill in a name and hit "Enter", then it refreshes the page without creating the new group
2. If you have at least one group category extant, and you fill in a name for a new one and hit "Enter", then it turns one of your existing group categories into edit mode.
It is strange this is an all-Javascript page. Perhaps it was a first step towards JS-ifying more of our list pages, which is a usability suggestion that has been made before. But it was done in a way that doesn't properly handle the "Enter" button.
I see basically what Kristina described:
1. If you have no group categories yet, and you fill in a name and hit "Enter", then it refreshes the page without creating the new group
2. If you have at least one group category extant, and you fill in a name for a new one and hit "Enter", then it turns one of your existing group categories into edit mode.
It is strange this is an all-Javascript page. Perhaps it was a first step towards JS-ifying more of our list pages, which is a usability suggestion that has been made before. But it was done in a way that doesn't properly handle the "Enter" button.