[CSE] Save folder id and token for the lock

So we can unlock it later. - perhaps we should store this
on the disk or something, to make it harder to lose.

src/libsync/propagateupload.cpp

@@ -278,6 +278,8 @@ void PropagateUploadFileCommon::slotFolderLockedSuccessfully(const QByteArray& f
   qDebug() << "Folder" << fileId << "Locked Successfully for Upload";
   // Should I use a mutex here?
   _currentLockingInProgress = true;
+  _folderToken = token;
+  _folderId = fileId;
 }
 
 void PropagateUploadFileCommon::slotFolderLockedError(const QByteArray& fileId, int httpErrorCode)

src/libsync/propagateupload.h

@@ -291,6 +291,8 @@ private slots:
 private:
     QElapsedTimer _folderLockFirstTry;
     bool _currentLockingInProgress;
+    QByteArray _folderToken;
+    QByteArray _folderId;
 
 protected:
     /**