ClickLabel: rename clicked to leftClicked and only fire when left mouse button clicked

gui/clicklabel.cpp

@@ -1,6 +1,11 @@
+#include <QMouseEvent>
 #include "clicklabel.h"
 
 void ClickLabel::mousePressEvent(QMouseEvent *event)
 {
-	emit clicked();
+	if(event->button() == Qt::LeftButton)
+	{
+		emit leftClick();
+	}
+	return QLabel::mousePressEvent(event);
 }