Use nested config structure

client/config.js

@@ -1,40 +1,3 @@
 "use strict";
 
-import * as Filter from "../common/filter";
-
-const configFile = window.clientConfig;
-
-const cache = {};
-
-function parse(name, value) {
-  if (/^ui\.overview\.charts\.[^.]+\.slices\.[^.]+\.filter$/.test(name))
-    return new Filter(value);
-
-  return value;
-}
-
-function get(name) {
-  let v = cache[name];
-  if (v === undefined) {
-    v = configFile[name];
-    if (v != null) {
-      v = parse(name, v);
-    } else {
-      const prefix = `${name}.`;
-      for (let k of Object.keys(configFile))
-        if (k.startsWith(prefix)) {
-          v = v || {};
-          let ar = k.slice(prefix.length).split(".");
-          let ref = v;
-          for (let a of ar.slice(0, -1)) ref = ref[a] = ref[a] || {};
-          ref[ar[ar.length - 1]] = parse(k, configFile[k]);
-        }
-    }
-    if (v) cache[name] = v;
-    else cache[name] = null;
-  }
-
-  return v;
-}
-
-export { get };
+export default window.clientConfig;