Ongoing review segments (#10924)

* Update review maintainer to save events when ongoing

* Handle previews for in progress review items

* Reset DB items in app

* Handle in progress review items

* Scroll back down to selected event item

* Handle undefined end time

* Formatting

* remove unused

* Make export handles have full resolution

* reduce preview thumbnail props

* fix missing return

Co-authored-by: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>

---------

Co-authored-by: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>

frigate/events/maintainer.py

@@ -1,4 +1,3 @@
-import datetime
 import logging
 import threading
 from multiprocessing import Queue
@@ -112,10 +111,6 @@ class EventProcessor(threading.Thread):
 
                 self.handle_external_detection(event_type, event_data)
 
-        # set an end_time on events without an end_time before exiting
-        Event.update(end_time=datetime.datetime.now().timestamp()).where(
-            Event.end_time == None
-        ).execute()
         self.event_receiver.stop()
         self.event_end_publisher.stop()
         logger.info("Exiting event processor...")