Adding possibility to add command line options when running doxygen f…

…rom doxygen wizard

For Qt5 `QT::SkipEmptyParts` is shown to be used , for QT4 this `QT::SkipEmptyParts` does not exist, but `QString::SkipEmptyParts`.
In Qt5 also `QString::SkipEmptyParts` still exists.

addon/doxywizard/doxywizard.cpp

@@ -507,7 +507,7 @@ void MainWindow::runDoxygen()
     m_runProcess->setEnvironment(env);
 
     QStringList args;
-    QStringList runOptions = m_runOptions->text().split(QLatin1Char(' '),Qt::SkipEmptyParts);
+    QStringList runOptions = m_runOptions->text().split(QLatin1Char(' '),QString::SkipEmptyParts);
 
     args << runOptions;
     args << QString::fromLatin1("-b"); // make stdout unbuffered