Suggestion: Type and autocomplete categories, keywords, and groups
Currently, when assigning keyword, category or group (referred to as K-C-G in the rest of the text) to a reference, one needs to click on the edit icon (the pencil) and either choose the desired word from a list (a search feature with autocomplete is available here) or press the new button and enter a new K-C-G.
While this works, the workflow could be improved by allowing the user to type in a new K-C-G right within the overview interface itself. While typing, relevant existing K-C-Gs could be offered as suggestions from a drop down autocomplete list. If a non-existing new K-C-G is entered then it can be straight away added to the list of the existing K-C-Gs.