build: fix compiler and cmake warnings

added missing virtual destructor
fixed a warning in token.h: expression with side effects will be evaluated despite being used as an operand to 'typeid'
CMP00043 Cmake warning
added missing override keyword

src/lib/component/view/GraphViewStyleImpl.h

@@ -6,6 +6,7 @@
 class GraphViewStyleImpl
 {
 public:
+	virtual ~GraphViewStyleImpl() { }
 	virtual float getCharWidthForNodeType(Node::NodeType type) = 0;
 	virtual float getCharHeightForNodeType(Node::NodeType type) = 0;
 };

src/lib/data/graph/Token.h

@@ -56,7 +56,8 @@ ComponentType* Token::getComponent() const
 {
 	for (std::shared_ptr<TokenComponent> component: m_components)
 	{
-		if (typeid(ComponentType) == typeid(*(component.get())))
+		TokenComponent* componentPtr = component.get();
+		if (typeid(ComponentType) == typeid(*componentPtr))
 		{
 			return dynamic_cast<ComponentType*>(component.get());
 		}
@@ -70,7 +71,8 @@ std::shared_ptr<ComponentType> Token::removeComponent()
 	for (size_t i = 0; i < m_components.size(); i++)
 	{
 		std::shared_ptr<TokenComponent> component = m_components[i];
-		if (typeid(ComponentType) == typeid(*(component.get())))
+		TokenComponent* componentPtr = component.get();
+		if (typeid(ComponentType) == typeid(*componentPtr))
 		{
 			m_components.erase(m_components.begin() + i);
 			return std::dynamic_pointer_cast<ComponentType>(component);

src/lib/utility/file/FileManager.h

@@ -11,7 +11,7 @@ class FileManager
 {
 public:
 	FileManager();
-	~FileManager();
+	virtual ~FileManager();
 
 	const std::vector<FilePath>& getSourcePaths() const;
 	const std::vector<FilePath>& getIncludePaths() const;