Add 'All Visits at the top'

Author: tzi

plugins/SegmentEditor/Controller.php

@@ -39,6 +39,7 @@ public function manageSegments(): string
         $view->showMenu = true;
 
         $view->segmentList = SegmentEditor\API::getInstance()->getAll($this->idSite);
+        array_unshift($view->segmentList, ['definition' => '', 'name' => Piwik::translate('SegmentEditor_DefaultAllVisits'), 'fixed' => true]);
         $view->segmentData = [];
         foreach ($view->segmentList as $index => $segment) {
             $view->segmentData[$index] = VisitsSummary\API::getInstance()