Fix running providers before call to init()

Author: brunomnsilva

src/main/java/com/brunomnsilva/smartgraph/graphview/SmartGraphPanel.java

@@ -424,6 +424,10 @@ public void init() throws IllegalStateException {
             timer.start();
         }
 
+        // If vertex/label shape/radius/etc. providers are set before the call to init(),
+        // we must update before the first layout of the panel.
+        updateNodes();
+
         this.initialized = true;
     }