Fixes (#18262)

* Don't use timezone in export dialog timestamps

Revert an unnecessary change made in https://github.com/blakeblackshear/frigate/pull/18257

* Ensure notifications register button is only disabled when both all cameras and every individual camera is disabled

* Send test notification if any cameras are enabled

* clarify docs about disabling cameras

* fix crash in autotracking zoom

* clean up

* masks and zones i18n fixes

* Check if camera is enabled in config

---------

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

web/public/locales/en/views/settings.json

@@ -191,6 +191,8 @@
         "copyCoordinatesFailed": "Could not copy coordinates to clipboard."
       }
     },
+    "motionMaskLabel": "Motion Mask {{number}}",
+    "objectMaskLabel": "Object Mask {{number}} ({{label}})",
     "form": {
       "zoneName": {
         "error": {