新增了配置的保存，以及第一次打开程序时安装默认配置

inc/page/spkpagedownloads.h

@@ -22,7 +22,7 @@ namespace SpkUi
       SpkDownloadMgr *mDownloadMgr;
       QMap<uint, SpkDownloadEntry*> mEntries;
       uint mNextDownloadId;
-      QQueue<QPair<int, QString>> mWaitingDownloads;
+      QQueue<QPair<uint, QString>> mWaitingDownloads;
       enum { Idle, Waiting, Downloading } mCurrentStatus;
 
       // UI

inc/spkconfig.h

@@ -37,6 +37,8 @@ class SpkConfig : public QObject
     QVariant ReadField(QString key, QVariant defaultValue);
     // Wrapper of QSettings::setValue, used for "set and restart to take effect" configurations
     void SetSettings(QString key, QVariant value);
+    // Wrapper of QSettings::sync
+    void Sync();
 
   private:
     QSettings mSettings;