Code re-organization in two libraries sdrbase and sdrgui in view of core / GUI split

sdrgui/gui/buttonswitch.cpp

@@ -0,0 +1,26 @@
+#include <QPainter>
+#include "gui/buttonswitch.h"
+
+ButtonSwitch::ButtonSwitch(QWidget* parent) :
+	QToolButton(parent)
+{
+	setCheckable(true);
+	m_originalPalette = palette();
+	connect(this, SIGNAL(toggled(bool)), this, SLOT(onToggled(bool)));
+}
+
+void ButtonSwitch::onToggled(bool checked)
+{
+	if(checked) {
+		QPalette p = m_originalPalette;
+		p.setColor(QPalette::Button, QColor(0x80, 0x46, 0x00));
+		setPalette(p);
+	} else {
+		setPalette(m_originalPalette);
+	}
+}
+
+void ButtonSwitch::doToggle(bool checked)
+{
+    onToggled(checked);
+}