Round times between 11:45 and 11:59 pm to 11:30 pm

Because the clock does only support times from 12:00 am to 11:30 pm
in 30 minute steps.

Author: jrauh01

library/Notifications/Widget/Timeline.php

@@ -370,8 +370,13 @@ protected function assemble()
                 )
             );
 
+            $beforeHour = $now->format('H');
             $now = Util::roundToNearestThirtyMinute($now);
 
+            if ($beforeHour === '23' && $now->format('H') === '00') {
+                $now->sub(new DateInterval('PT30M'));
+            }
+
             $this->getStyle()->addFor($currentTime, [
                 '--timeStartColumn' =>
                     $now->format('G') * 2 // 2 columns per hour