Display Dewar name in puck loading dialog.

src/main/java/ch/psi/mxsc/Controller.java

@@ -833,6 +833,14 @@ public class Controller {
         }
     }
 
+    Map getPuckDatamatrixInfo() {
+        try {
+            return (Map) Context.getInstance().evalLineBackground("get_puck_datamatrix_info()");
+        } catch (Exception ex) {
+            return null;
+        }
+    }   
+
     void askPuckDatamatrix(Puck puck) {
         if ((dialogAskPuckDatamatrix != null) && (dialogAskPuckDatamatrix.isShowing())) {
             dialogAskPuckDatamatrix.setVisible(false);