ui & logic: fixes for release

* smaller indexing progress dialog with bar in the middle instead of golden ratio
* set default code snippet expand range to 3
* no minimum height for project file location element in project setup wizard
* move aggregation and inheritance edges to front when hovered or active
* push parent nodes of active nodes to back to make edges to the active child visible
* properly quit application when window is closed while confirm box is open
* properly quit application when window is closed while indexing
* only count top level nodes for count on bundle nodes
* give noLetterScore to index 0 in search index scoring

bug id = 121

src/lib/utility/messaging/type/MessageWindowClosed.h

@@ -0,0 +1,21 @@
+#ifndef MESSAGE_WINDOW_CLOSED_H
+#define MESSAGE_WINDOW_CLOSED_H
+
+#include "utility/messaging/Message.h"
+
+class MessageWindowClosed
+	: public Message<MessageWindowClosed>
+{
+public:
+	MessageWindowClosed()
+	{
+		setSendAsTask(false);
+	}
+
+	static const std::string getStaticType()
+	{
+		return "MessageWindowClosed";
+	}
+};
+
+#endif // MESSAGE_WINDOW_CLOSED_H