Since the pr templates states i have to create an issue....
I created a panel with a single category and was irritated that the button on the panel didn´t refelct my selected emoji and title of the category as expected. So i looked up the implementation here and was surprised to see that the logic implements that when the panel has a single button some fixxed emoji and title from the locales are used (which can´t be chnaged).
I see the idea/reason that if you only have a panel for a single category you may want the button to say something else than the categorys title but first of all this should be changeable and secondly it would be a better implementation to be able to send single categorys from the categorys tab.
I created a PR: #617