We have that near the top of our backlog so we should get it soon. Really the dark theme template knocked it out of its position.
You can rename your games right now (just not easy)...
Easiest way but not suggested: If you delete your minion.xml it should name the PTS properly as pts. It just doesn't do it if you already have a minion.xml and your a long time minion user since it only adds the name upon game detection which only happens when there is no minion.xml.
More difficult way: If you rather not blow away your minion config (understandable) just open the minion.xml and add the following:
Find:
<game addon-path="hash" ... game-id="ESO" unique-game-id="ESO-2">
Add:
display-name="Elder Scrolls Online (PTS)"
So it looks like:
<game addon-path="hash" auto-update="false" display-name="Elder Scrolls Online (PTS)" game-id="ESO" unique-game-id="ESO-2">