Switch to side-by-side view

--- a/GUI/playctlwidget/playctlwidget.cpp
+++ b/GUI/playctlwidget/playctlwidget.cpp
@@ -26,6 +26,11 @@
     connect(btn_stop, SIGNAL(clicked()), this, SLOT(onStopClicked()));
     connect(btn_fw, SIGNAL(clicked()), this, SLOT(onForwardClicked()));
     connect(btn_bw, SIGNAL(clicked()), this, SLOT(onBackwardClicked()));
+}
+
+QWidget *PlayCtlWidget::stopWidget()
+{
+    return btn_stop;
 }
 
 void PlayCtlWidget::onStopped()