First of all, I have to say this is such a nice extension for wiki use. But there's only one question in my mind that I would like to point out.
In my opinion, I will hope to see assigned categories also show up in wikitext. For example:
Assigned category: Test1
There should be one additional line in wikitext: [[Category:Test1]]
Therefore, I don't have to worry about all pages with categories assigned will gone if I removed MsCatSelect someday in future because of some reason.
Even now this extension is working perfectly. I still worry about that what if this extension is not working since I upgrade my MW version? If not working, will all my pages lost their assigned categories since I temporary disable this extension? It's impossible to add manually back to each page for large wiki sites.
So, pls kindly let me know what can I do to prevent from this issue?
Maybe there's already solution for this problem that I never know, or you can take this as suggestion for possible implement. Thanks again!