Add a way to get jqueryui version (#2084)

This can be tested [here](http://linuxmao.org/open%20stage%20control)

src/apps.json

@@ -11416,6 +11416,9 @@
       ],
       "icon": "jQuery UI.svg",
       "implies": "jQuery",
+      "js": {
+        "jQuery.ui.version": "(.*)\\;version:\\1"
+      },
       "script": [
         "jquery-ui(?:-|\\.)([\\d.]*\\d)[^/]*\\.js\\;version:\\1",
         "([\\d.]+)/jquery-ui(?:\\.min)?\\.js\\;version:\\1",