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_gui/qt/window/QtMainWindow.cpp

@@ -36,6 +36,7 @@
 #include "utility/messaging/type/MessageResetZoom.h"
 #include "utility/messaging/type/MessageSearch.h"
 #include "utility/messaging/type/MessageUndo.h"
+#include "utility/messaging/type/MessageWindowClosed.h"
 #include "utility/messaging/type/MessageWindowFocus.h"
 #include "utility/messaging/type/MessageZoom.h"
 #include "utility/ResourcePaths.h"
@@ -314,6 +315,11 @@ void QtMainWindow::contextMenuEvent(QContextMenuEvent* event)
 	QtContextMenu::getInstance()->showDefault(event, this);
 }
 
+void QtMainWindow::closeEvent(QCloseEvent* event)
+{
+	MessageWindowClosed().dispatch();
+}
+
 void QtMainWindow::about()
 {
 	QtAbout* aboutWindow = createWindow<QtAbout>();