Comment 7 for bug 1848398

Since I suggested it: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/jboyer/lp1848398_fare_thee_well_format / working/user/jboyer/lp1848398_fare_thee_well_format

Does what I said above; move all AndularJS use of format.date to webstaff.format.dates (and I didn't see any use of format.time so that was a whole lot of nothing), remove the settings entirely from seed data, and set their deprecated-ness one last time if they have been missed in the past. Includes a release note telling admins they can remove them whenever they like, but they're left in place just in case they may be in use in a local customization.