Add Common::databasePath which also allows overriding it

shared/common.cpp

@@ -1,3 +1,5 @@
+#include <QProcessEnvironment>
+#include <QSettings>
 #include "common.h"
 
 void Common::setupAppInfo()
@@ -6,3 +8,14 @@ void Common::setupAppInfo()
 	QCoreApplication::setOrganizationDomain("quitesimple.org");
 	QCoreApplication::setApplicationName("qss");
 }
+
+QString Common::databasePath()
+{
+	QString env = QProcessEnvironment::systemEnvironment().value("QSS_DB_OVERRIDE");
+	if(env == "")
+	{
+		QSettings settings;
+		return settings.value("dbpath").toString();
+	}
+	return env;
+}