Update translation

Add missing translation.

spark-webapp-runtime/mainwindow.cpp

@@ -31,7 +31,7 @@ MainWindow::MainWindow(QString szTitle,
     , btnForward(new DToolButton(titlebar()))
     , btnRefresh(new DToolButton(titlebar()))
     , m_menu(new QMenu)
-    , m_fullScreen(new QAction("Full Screen"))
+    , m_fullScreen(new QAction(tr("Full Screen")))
     , m_fixSize(new QAction(tr("Fix Size")))
     , m_hideButtons(new QAction(tr("Hide Buttons")))
     , bar(new DProgressBar)

spark-webapp-runtime/translations/spark-webapp-runtime_zh_CN.ts

@@ -3,6 +3,11 @@
 <TS version="2.1" language="zh_CN">
 <context>
     <name>MainWindow</name>
+    <message>
+        <location filename="../mainwindow.cpp" line="34"/>
+        <source>Full Screen</source>
+        <translation>全屏显示</translation>
+    </message>
     <message>
         <location filename="../mainwindow.cpp" line="35"/>
         <source>Fix Size</source>