Don't show dialog, if no model account has been deleted

client/src/main/java/ctbrec/ui/action/CheckModelAccountAction.java

@@ -56,6 +56,7 @@ public class CheckModelAccountAction {
                     }
                 }
             } finally {
+                if (!deletedAccounts.isEmpty()) {
                     Platform.runLater(() -> {
                         b.setDisable(false);
                         b.setText(buttonText);
@@ -68,7 +69,6 @@ public class CheckModelAccountAction {
                             .append(deletedModel.getUrl())
                             .append(')').append('\n');
                         }
-
                         boolean remove = Dialogs.showConfirmDialog("Deleted Accounts", sb.toString(),
                                 "The following accounts seem to have been deleted. Do you want to remove them?", b.getScene());
                         if (remove) {
@@ -76,6 +76,7 @@ public class CheckModelAccountAction {
                         }
                     });
                 }
+            }
         });
         new Thread(checker).start();
     }