Show the desktop shell in Chinese under zh_CN

shell/Commons/Tr.js

@@ -0,0 +1,11 @@
+.pragma library
+.import "I18nZh.js" as Zh
+
+// Shell text in the session's language; QML reaches this through the I18n singleton, plain JS imports it.
+var chinese = Qt.locale().name.indexOf("zh_CN") === 0
+
+function tr(text) {
+  var out = chinese && Zh.table[text] !== undefined ? Zh.table[text] : text
+  for (var i = 1; i < arguments.length; i++) out = out.split("%" + i).join(String(arguments[i]))
+  return out
+}