Add fallback using QDesktopServices::openUrl() for "run" action

Users not familiar with launching processes with arguments might expect
the run action to behave like clicking on icons on the desktop and be
frustrated if the "file is not being opened".
Thus introducing this fallback might help some users out.

src/macro-action-run.cpp

@@ -5,6 +5,7 @@
 
 #include <QProcess>
 #include <QFileDialog>
+#include <QDesktopServices>
 
 const std::string MacroActionRun::id = "run";
 
@@ -14,7 +15,13 @@ bool MacroActionRun::_registered = MacroActionFactory::Register(
 
 bool MacroActionRun::PerformAction()
 {
-	QProcess::startDetached(QString::fromStdString(_path), _args);
+	if (!QProcess::startDetached(QString::fromStdString(_path), _args) &&
+	    _args.empty()) {
+		vblog(LOG_INFO, "run \"%s\" using QDesktopServices",
+		      _path.c_str());
+		QDesktopServices::openUrl(
+			QUrl::fromLocalFile(QString::fromStdString(_path)));
+	}
 	return true;
 }