Don't show tag aliases in tags list

[mbaruh]

Tags can have aliases, and they clutter the tags list. A person going over the possible tags will see several entries of the same tag, and might be unable to open the tag if trying to invoke its aliases one after another because of tag cooldown, leading to confusion.

Only the main tag name should be used, and we should have a better way to see a tag's aliases if we want them for anything beyond fuzzy matching (for example by showing all names in the same list entry).