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.cpp

@@ -13,6 +13,10 @@ RefreshController::~RefreshController()
 {
 }
 
+void RefreshController::clear()
+{
+}
+
 void RefreshController::handleMessage(MessageAutoRefreshChanged* message)
 {
 	m_autoRefreshEnabled = message->enabled;