Feedback from Waldir

I keep getting edit conflicts, not sure why. (Same as the issue mentioned by Xiplus elsewhere on this talk page.)

 Done (but please test)

At the moment, edit conflicts only occur when I add terms from one tab and then try to do the same from another tab that was open before the first edit. So, only in expected circumstances. Seems resolved. That said, I wonder if the JSON format might be more prone to conflicts due to the delimiters being all the same... I know it tends to confuse regular diff tools.