Store connection configuration as key value pairs

Add migration for the sqlite database.
Because the Qt SQL library is a bit hard to work with use sqlite through custom wrapper.

pglab/MasterController.h

@@ -2,11 +2,11 @@
 #define MASTERCONTROLLER_H
 
 #include <QObject>
-#include <QSqlDatabase>
 #include <atomic>
 #include <future>
 #include <map>
 #include <memory>
+#include "sqlite/SQLiteConnection.h"
 
 
 class ConnectionController;
@@ -23,14 +23,14 @@ public:
 	void init();
 
 	ConnectionController* connectionController();
-	QSqlDatabase& userConfigDatabase();
+    SQLiteConnection& userConfigDatabase();
     
 signals:
 
 public slots:
 
 private:
-	QSqlDatabase m_userConfigDatabase;
+    SQLiteConnection m_userConfigDatabase;
 	ConnectionController* m_connectionController = nullptr;
 };