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Followup 503f9b6f02
This previous commit introduced an autogenerated
settings route for every plugin with more than one
setting defined. Plugins with only one setting
only have enabled_site_settings defined, which are
handled using the toggle in the admin plugin list,
so we don't need a dedicated setting page for them.
However in production this introduced a performance
issue, since we were looking through SiteSetting.all_settings
for every plugin, which could be quite slow in some
cases especially on our hosting.
Instead, we already have all the plugin settings cached
inside `SiteSetting.plugins`. We can instead use this to
count how many settings the plugin has, then if there is > 1
for a plugin we use the settings route. This is a much faster lookup
than
searching through SiteSetting.all_settings.