RoutingPanel: missing link to presenter class (#329)

RoutingPanel displays name of current presenter with current action method and link to presenter class file in IDE. In case that method of current presenter doesnt exists - this link is missing. Proposed change of code fixes this small bug.

src/Bridges/ApplicationTracy/RoutingPanel.php

@@ -134,7 +134,10 @@ private function findSource(): \ReflectionClass|\ReflectionMethod|string|null
 			if (isset($params[Presenter::SignalKey])) {
 				return $rc->getSignalMethod($params[Presenter::SignalKey]);
 			} elseif (isset($params[Presenter::ActionKey])) {
-				return $rc->getActionRenderMethod($params[Presenter::ActionKey]);
+				$method = $rc->getActionRenderMethod($params[Presenter::ActionKey]);
+				if($method){
+					return $method;
+				}
 			}
 		}