Keep display timezone on drag & drop

Author: jrauh01

application/controllers/ScheduleController.php

@@ -219,7 +219,13 @@ public function moveRotationAction(): void
         $form = new MoveRotationForm(Database::get());
         $form->on(MoveRotationForm::ON_SUCCESS, function (MoveRotationForm $form) {
             $this->sendExtraUpdates(['#col1']);
-            $this->redirectNow(Links::schedule($form->getScheduleId()));
+            $requestUrl = Url::fromRequest();
+            $redirectUrl = Links::schedule($form->getScheduleId());
+            $defaultTimezoneParam = TimezonePicker::DEFAULT_TIMEZONE_PARAM;
+            if ($requestUrl->hasParam($defaultTimezoneParam)) {
+                $redirectUrl->addParams([$defaultTimezoneParam => $requestUrl->getParam($defaultTimezoneParam)]);
+            }
+            $this->redirectNow($redirectUrl);
         });
 
         $form->handleRequest($this->getServerRequest());

library/Notifications/Widget/Timeline.php

@@ -307,7 +307,11 @@ protected function assembleSidebarEntry(Rotation $rotation): BaseHtmlElement
         $entry = new HtmlElement('div', Attributes::create(['class' => 'rotation-name']));
 
         $form = new MoveRotationForm();
-        $form->setAction(Links::moveRotation()->getAbsoluteUrl());
+        $form->setAction(
+            Links::moveRotation()
+                ->with(['display_timezone' => ScheduleDateTimeFactory::getDisplayTimezone()->getName()])
+                ->getAbsoluteUrl()
+        );
         $form->populate([
             'rotation' => $rotation->getId(),
             'priority' => $rotation->getPriority()