This new method batch-loads them from the database, and removes the
cache-layer with the intention that a couple of batch fetches from the
DB is more efficient than hitting the cache each time.
Changes their endpoints and remove the user id from the URLs.
Simplifies list changes to share a single endpoint, which aligns it to
the behaviour of the existing sort preference endpoint.
Also added test to ensure user preferences are deleted on user delete.
Also allowed config-centralised default user settings for this change
and bought existing user-level view options into that default settings
system to be cleaner in code usage.
For #2081
Made so footer link ordering, names and urls can be set.
Cleaned up some of the setting-service and added support for array
setting types, which are cleaned on entry and stored as json with a new
type indicator column on the settings table for auto-decode.
Also added testing to cover this feature.
Related to #1973 and #854
- Was only used to disable registration when LDAP was enabled.
- Caused saved option not to show on settings page causing confusion.
- Extended setting logic where used to take ldap into account instead of
global override.
- Added warning on setting page to show registration enable setting is
not used while ldap is active.
For #1541
