System announcements: Fix edit

public/main/admin/system_announcements.php

@@ -308,7 +308,7 @@ if ($action_todo) {
         $form->addHidden('action', 'edit');
     }
     $form->addElement('checkbox', 'send_email_test', null, get_lang('Send an email to myself for testing purposes.'));
-    $form->addButtonSend($text, 'submit');
+    $form->addButtonSend($text);
     $form->setDefaults($values);
 
     if ($form->validate()) {
@@ -420,7 +420,6 @@ if ($action_todo) {
 }
 
 if ($show_announcement_list) {
-    var_dump(api_get_url_entity()->getId());
     $criteria = ['url' => api_get_url_entity()];
     $announcements = $repo->findBy($criteria);
     $announcement_data = [];

public/main/inc/lib/formvalidator/Element/DateRangePicker.php

@@ -51,7 +51,7 @@ class DateRangePicker extends HTML_QuickForm_text
         );
     }
 
-    public function parseDateRange(array $dateRange): array
+    public function parseDateRange(string $dateRange): array
     {
         $dateRange = Security::remove_XSS($dateRange);
         $dates = explode('/', $dateRange);
@@ -140,7 +140,7 @@ class DateRangePicker extends HTML_QuickForm_text
     {
         $js = null;
         $id = $this->getAttribute('id');
-        $dateRange = $this->getAttribute('value');
+        $dateRange = (string) $this->getAttribute('value');
 
         $defaultDates = null;
         if (!empty($dateRange)) {

public/main/inc/lib/system_announcements.lib.php

@@ -336,12 +336,11 @@ class SystemAnnouncementManager
         $promotionId = 0
     ) {
         $sysRepo = Container::getSysAnnouncementRepository();
-        /** @var SysAnnouncement $announcement */
+        /** @var SysAnnouncement|null $announcement */
         $announcement = $sysRepo->find($id);
         if (null === $announcement) {
             return false;
         }
-
         $a_dateS = explode(' ', $date_start);
         $a_arraySD = explode('-', $a_dateS[0]);
         $a_arraySH = explode(':', $a_dateS[1]);