src: Various fixes from testing

* fixed deleted project could still be selected in the recent project menu
* fixed project file not loaded when declining for reload
* fixed main in tutorial description not clickable
* fixed clang warnings
* fixed commands not showing up in autocompletion
* fixed classes were expanded when activating aggregation
* fixed crash when messagelisteners tried to unregister after messagequeue was destructed

src/lib/data/parser/ParserClientImpl.cpp

@@ -389,6 +389,8 @@ Node::NodeType ParserClientImpl::symbolTypeToNodeType(SymbolType symbolType) con
 		return Node::NODE_TEMPLATE_PARAMETER_TYPE;
 	case SYMBOL_UNION:
 		return Node::NODE_TYPE;
+	default:
+		break;
 	}
 	return Node::NODE_UNDEFINED;
 }