Fix memory leaks

src/app/app.cpp

@@ -31,6 +31,7 @@ INITIALIZE_EASYLOGGINGPP
 
 Application::Application(int &argc, char **argv)
     : QApplication(argc, argv),
+      m_engine(this),
       m_qmlUtils(QSharedPointer<QmlUtils>(new QmlUtils())),      
       m_logger(nullptr)
 {

src/app/models/key-models/abstractkey.h

@@ -146,8 +146,7 @@ public:
             QList<QByteArray> cmdParts = m_partialLoadingCmd.split(' ');
             cmdParts.replace(cmdParts.indexOf("%1"), m_keyFullPath);
 
-            QSharedPointer<RedisClient::ScanCommand> cmd(
-                        new RedisClient::ScanCommand(cmdParts, m_dbIndex));
+            RedisClient::ScanCommand cmd(cmdParts, m_dbIndex);
             try {
                 m_connection->retrieveCollection(cmd, [this, callback, rowStart](QVariant result, QString)
                 {