#62 New method for clearing (removing) all child dialogs

core/src/cz/nic/tablexia/util/ui/dialog/TablexiaDialog.java

@@ -102,6 +102,10 @@ public class TablexiaDialog extends Dialog {
         childDialogs.add(dialog);
     }
 
+    public void clearChildDialogs() {
+        childDialogs.clear();
+    }
+
     @Override
     public Dialog show(Stage stage) {
         if (!contentPrepared) {