Refresh serial port list after loading contributed packages

Soves nameless boards if contributed cores loading is slow

arduino-core/src/processing/app/BaseNoGui.java

@@ -409,7 +409,10 @@ public class BaseNoGui {
     }
 
     BaseNoGui.initPackages();
-    
+
+    // refresh the serial port names after loading all packages
+    BaseNoGui.getDiscoveryManager().getSerialDiscoverer().forceRefresh();
+
     // Setup board-dependent variables.
     onBoardOrPortChange();