Organized options into more relavant tabs.
Made QSlider handle larger for easier dragging.
Changed initial volume option from a spin box to a slider.
#include <QApplication>
#include "mainform.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyWindow *mainWin = new MyWindow;
mainWin->show();
return app.exec();
}