ui/data: cleaned up UI and parsing

* HOT FIX: typename not always correctly split to name hierarchy
* show node main if available as first active token after parsing
* show all contents of namespaces if searched for
* added missing enum type and enum value usages
* added inheritance for structs
* removed MessageActivateToken and replaced it with MessageActivateTokens
* activating correct nodes for clicks in GraphView and CodeView
* no graph change when clicking an edge, but highlighting the edge instead
* only show active nodes without connections when multiple are activated
* fixed snippet sorting to put file that contains declarations on top
* set sizeHints on CodeView and SearchView to increase their initial size

fortune cookie message = Das Leben wird eine positive Wendung nehmen.

src/app/qt/element/QtSearchBar.cpp

@@ -52,6 +52,11 @@ QtSearchBar::~QtSearchBar()
 {
 }
 
+QSize QtSearchBar::sizeHint() const
+{
+	return QSize(400, 100);
+}
+
 void QtSearchBar::setText(const std::string& text)
 {
 	m_searchBox->setQuery(text);