Screenshots: Optimize image loading and memory use, fix list and button layout.

logic/screenshots/Screenshot.cpp

@@ -0,0 +1,14 @@
+#include "Screenshot.h"
+#include <QImage>
+#include <QIcon>
+QIcon ScreenShot::getImage()
+{
+	if(!imageloaded)
+	{
+		QImage image(file);
+		QImage thumbnail = image.scaledToWidth(256, Qt::SmoothTransformation);
+		m_image = QIcon(QPixmap::fromImage(thumbnail));
+		imageloaded = true;
+	}
+	return m_image;
+}