Set drawing to dirty after importing an image

Fixes desynced view in HubNet

Author: ERSUCC

src/main/BitmapExtension.java

@@ -254,6 +254,8 @@ public void perform(Argument args[], Context context)
 
       drawing.createGraphics().drawImage(image, xOffset, yOffset,
           null);
+
+      context.workspace().renderer().trailDrawer().sendPixels(true);
     }
   }