Fix panoramax blur when switching imagery (#10385)

fixes #10362

modules/services/pannellum_photo.js

@@ -147,6 +147,8 @@ export default {
       _pannellumViewer.removeScene(old_key);
     }
 
+    _pannellumViewer.resize();
+
     return this;
   },
 

modules/svg/panoramax_images.js

@@ -295,6 +295,7 @@ export function svgPanoramaxImages(projection, context, dispatch) {
         if (!service) return;
 
         const frame = service.photoFrame();
+        if (!frame) return;
 
         // update viewfield rotation
         _viewerYaw = frame.getYaw();