Add search and links to plugin settings (#4854)

* Show links to plugin views and settings in plugin list and in success message after activating a plugin
* Fix menu highlighting in payment provider settings
* Specify settings_links and navigation_links for built-in plugins
* Add link to payment plugins from payment settings
* Add client-side search and "View only active plugins" for plugins page

src/pretix/control/navigation.py

@@ -59,7 +59,7 @@ def get_event_navigation(request: HttpRequest):
                     'event': request.event.slug,
                     'organizer': request.event.organizer.slug,
                 }),
-                'active': url.url_name == 'event.settings.payment',
+                'active': url.url_name in ('event.settings.payment', 'event.settings.payment.provider'),
             },
             {
                 'label': _('Plugins'),