Moved some parts to a static lib so both the executable and the tests can link to it.

Written additional tests.

src/ParamTypeDelegate.cpp

@@ -22,6 +22,7 @@ QWidget *ParamTypeDelegate::createEditor(QWidget *parent,
 	QWidget *w = nullptr;
 
 	QComboBox *cmbbx = new QComboBox(parent);
+	cmbbx->setMaxVisibleItems(32);
 	cmbbx->setModel(m_typeSelectionModel);
 	w = cmbbx;