The fact the secondary tags are only sorted by popularity causes problems, specially when they are not of the same sort (I've read this issue talked about in older threads, but more as a support question, not as a proposal, so here it is).

The idea would be to have an option in the tag admin panel to respect the order of the secondary tags as chosen by the user (exactly like for the primary tags).

Because in the current situation, it can quickly become a mess... For instance, here, in my tag-cloud, I have all mixed-up tags of countries (not in alphabetical order), of decades (not in their chronological order), in the middle of others tags (like movie-type):

It's really difficult for someone to find the country or decade they're looking for in that, it takes at least a few seconds.

It can also have some absurd results in the tag-items. Here for instance, I have two decades and one country concerned, but because the 50' tag seems more popular than the country's one (France), which is itself more popular than the 60' tag, I have this weird order of decade-country-decade:

Finally (even if it wouldn't be useful to me, but it could be to others), there could also be an option to just sort the secondary tags alphabetically (there would therefore be three options proposed : sort by popularity / alphabetically / by chosen order in the panel)

On a side-note: it's a little detail, but as it concerns secondary tags display, and that i can't make a topic just for that, here is a tiny styling bug I encounter in tag-cloud... When hovering the tag, the space between the icon and the tag is underlined too.

It's not a margin thing, it's just a space automatically added before the text in the html. Anyone as an idea of how to remove it (in order to replace it with a margin which will not be underlined)? I tried threw css with ::first-letter, but it didn't work strangely.