[Tiki-devel] Remove users options fix

Hi all

I've just merged in https://gitlab.com/tikiwiki/tiki/-/merge_requests/1929 which is:

> [FIX] users: Restore and improve the remove_users dialog with options for removing their wiki pages, tracker items, user files and then banning them, lost several tikis ago

Seems when the new service confirmation system was added the ability to remove a user's data was lost (tracker items, files and userpage), several tikis ago... this commit restores that (but with bootstrap5 layout).

As this involves deliberate data loss i'm rather concerned it gets well tested before 25.0 is released, and if it seems ok, i need to backport it to 24.x too, to help with the ongoing relentless avalanche of spammers registering.

I know this is hard to test, but i hope some will try (i've spent a long time testing too, but i'm notoriously bad at finding my own bugs ;)

Take backups obviously!

Thanks in advance,

jonny