ui: Added shortcuts for navigating to next and previous reference in code view

* Added new class QtCodeNavigator between QtCodeView and QtCodeFileList that handles active ids and navigation
* Pass all files as initially collapsed to code view and decide in QtCodeNavigator which ones show content
* Rewrote requesting of active snippet display to top down approach
* Display other locations focused when active location changes
* Show corresponding edges when navigating references

src/lib_gui/qt/window/QtMainWindow.cpp

@@ -24,6 +24,7 @@
 #include "settings/ProjectSettings.h"
 #include "utility/file/FileSystem.h"
 #include "utility/logging/logging.h"
+#include "utility/messaging/type/MessageCodeReference.h"
 #include "utility/messaging/type/MessageDispatchWhenLicenseValid.h"
 #include "utility/messaging/type/MessageFind.h"
 #include "utility/messaging/type/MessageInterruptTasks.h"
@@ -432,6 +433,16 @@ void QtMainWindow::findFulltext()
 	MessageFind(true).dispatch();
 }
 
+void QtMainWindow::codeReferencePrevious()
+{
+	MessageCodeReference(MessageCodeReference::REFERENCE_PREVIOUS).dispatch();
+}
+
+void QtMainWindow::codeReferenceNext()
+{
+	MessageCodeReference(MessageCodeReference::REFERENCE_NEXT).dispatch();
+}
+
 void QtMainWindow::overview()
 {
 	MessageSearch(std::vector<SearchMatch>(1, SearchMatch::createCommand(SearchMatch::COMMAND_ALL))).dispatch();
@@ -602,6 +613,11 @@ void QtMainWindow::setupEditMenu()
 
 	menu->addSeparator();
 
+	menu->addAction(tr("Code Reference Next"), this, SLOT(codeReferenceNext()), QKeySequence(Qt::CTRL + Qt::Key_G));
+	menu->addAction(tr("Code Reference Previous"), this, SLOT(codeReferencePrevious()), QKeySequence(Qt::SHIFT + Qt::CTRL + Qt::Key_G));
+
+	menu->addSeparator();
+
 	menu->addAction(tr("&To overview"), this, SLOT(overview()), QKeySequence::MoveToStartOfDocument);
 
 	menu->addSeparator();

src/lib_gui/qt/window/QtMainWindow.h

@@ -115,6 +115,8 @@ public slots:
 
 	void find();
 	void findFulltext();
+	void codeReferencePrevious();
+	void codeReferenceNext();
 	void overview();
 
 	void closeWindow();