Show previous games on focused pairable

view-webapp/src/main/webapp/js/main.js

@@ -362,3 +362,14 @@ onLoad(() => {
     });
   }
 });
+
+// Element.clearChildren method
+if( typeof Element.prototype.clearChildren === 'undefined' ) {
+  Object.defineProperty(Element.prototype, 'clearChildren', {
+    configurable: true,
+    enumerable: false,
+    value: function() {
+      while(this.firstChild) this.removeChild(this.lastChild);
+    }
+  });
+}