src: miscellaneous bug fixes for upcoming release

* only randomize parsing order of source files for multithreaded indexing
* fixed overview not displayed when switching projects due to MessageScrollCode being dispatched
* avoid adding duplicate TokenLocations that causes highlighting to break in QtCodeArea
* clear all controllers when switching project
* maximize unindexed file when clicking title instead of activating it

src/lib/component/controller/RefreshController.h

@@ -17,6 +17,8 @@ public:
 	RefreshController();
 	virtual ~RefreshController();
 
+	virtual void clear();
+
 private:
 	virtual void handleMessage(MessageAutoRefreshChanged* message);
 	virtual void handleMessage(MessageWindowFocus* message);