feat(layer-image): correct z index on bring to front/back

Closes MIN-91

src/components/Map/MapViewer/utils/config/additionalLayers/useOlMapAdditionalLayers.ts

@@ -59,15 +59,15 @@ export const useOlMapAdditionalLayers = (
   const arrowTypes = useSelector(arrowTypesSelector);
   const pointToProjection = usePointToProjection();
 
-  const { lastMessage } = useWebSocketEntityUpdatesContext();
+  const { lastJsonMessage } = useWebSocketEntityUpdatesContext();
 
   useEffect(() => {
-    if (!lastMessage) {
+    if (!lastJsonMessage || !('entityType' in lastJsonMessage)) {
       return;
     }
 
-    processMessage({ message: lastMessage, mapInstance });
-  }, [lastMessage, mapInstance]);
+    processMessage({ jsonMessage: lastJsonMessage, mapInstance });
+  }, [lastJsonMessage, mapInstance]);
 
   const restrictionExtent: Extent = useMemo(() => {
     const restrictionMinPoint = pointToProjection({ x: 0, y: 0 });