logic: rewrote messages handling token activation for correct restoring on undo

* saving search query to undo stack with MessageSearch
* saving node and edge with name to undo stack with MessageActivateNode and MessageActivateEdge
* added FeatureController that handels distribution of MessageActivateTokens
* clearing views when refreshing or changing project
* clearing undo stack when changing project
* added StorageCache derived from StorageAccessProxy

src/lib/component/ComponentFactory.cpp

@@ -2,6 +2,7 @@
 
 #include "component/Component.h"
 #include "component/controller/CodeController.h"
+#include "component/controller/FeatureController.h"
 #include "component/controller/GraphController.h"
 #include "component/controller/RefreshController.h"
 #include "component/controller/SearchController.h"
@@ -42,6 +43,13 @@ std::shared_ptr<Component> ComponentFactory::createCodeComponent(ViewLayout* vie
 	return std::make_shared<Component>(view, controller);
 }
 
+std::shared_ptr<Component> ComponentFactory::createFeatureComponent()
+{
+	std::shared_ptr<Controller> controller = std::make_shared<FeatureController>(m_storageAccess);
+
+	return std::make_shared<Component>(nullptr, controller);
+}
+
 std::shared_ptr<Component> ComponentFactory::createGraphComponent(ViewLayout* viewLayout)
 {
 	std::shared_ptr<View> view = m_viewFactory->createGraphView(viewLayout);