ui: augmented autocompletion list

This change adds search match information to the autocompletion list:
- matching letters
- color for token or command
- node type as string

src/lib/data/graph/Edge.h

@@ -49,7 +49,7 @@ public:
 
 	// Logging.
 	std::string getTypeString(EdgeType type) const;
-	std::string getTypeString() const;
+	virtual std::string getTypeString() const;
 	std::string getAsString() const;
 
 private:

src/lib/data/graph/Node.h

@@ -79,7 +79,7 @@ public:
 
 	// Logging.
 	std::string getTypeString(NodeType type) const;
-	std::string getTypeString() const;
+	virtual std::string getTypeString() const;
 	std::string getAsString() const;
 
 private:

src/lib/data/graph/Token.h

@@ -31,6 +31,9 @@ public:
 	template <typename ComponentType>
 	std::shared_ptr<ComponentType> removeComponent();
 
+	// Logging.
+	virtual std::string getTypeString() const = 0;
+
 protected:
 	Token(const Token& other);