src: Improved project loading performance

* faster hierarchy cache building
* cache symbol definition kinds
* don't request files when caches can be used
* save SearchEdge by starting character in SearchNode to avoid iteration when adding to SearchIndex
* fixed disabled state of some search buttons

src/lib/data/parser/ParserClientImpl.cpp

@@ -188,7 +188,7 @@ Id ParserClientImpl::addNodeHierarchy(NameHierarchy nameHierarchy, Node::NodeTyp
 	}
 
 	Id parentNodeId = 0;
-	NameHierarchy currentNameHierarchy(nameHierarchy.getDelimiterrr());
+	NameHierarchy currentNameHierarchy(nameHierarchy.getDelimiter());
 
 	for (size_t i = 0; i < nameHierarchy.size(); i++)
 	{