ui: Don't show start window when opening project with double-click

* added menu option to show start window

src/lib_gui/qt/view/QtMainView.cpp

@@ -150,6 +150,18 @@ void QtMainView::handleMessage(MessageForceEnterLicense* message)
 	);
 }
 
+void QtMainView::handleMessage(MessageLoadProject* message)
+{
+	bool showStartWindow = message->projectSettingsFilePath.empty();
+
+	m_onQtThread(
+		[=]()
+		{
+			m_window->loadWindow(showStartWindow);
+		}
+	);
+}
+
 void QtMainView::handleMessage(MessageProjectEdit* message)
 {
 	m_onQtThread(
@@ -172,13 +184,3 @@ void QtMainView::handleMessage(MessageProjectNew* message)
 		}
 	);
 }
-
-void QtMainView::handleMessage(MessageShowStartScreen* message)
-{
-	m_onQtThread(
-		[=]()
-		{
-			m_window->showStartScreen();
-		}
-	);
-}

src/lib_gui/qt/view/QtMainView.h

@@ -11,9 +11,9 @@
 
 #include "utility/messaging/MessageListener.h"
 #include "utility/messaging/type/MessageForceEnterLicense.h"
+#include "utility/messaging/type/MessageLoadProject.h"
 #include "utility/messaging/type/MessageProjectEdit.h"
 #include "utility/messaging/type/MessageProjectNew.h"
-#include "utility/messaging/type/MessageShowStartScreen.h"
 
 class QtMainWindow;
 class View;
@@ -21,9 +21,9 @@ class View;
 class QtMainView
 	: public MainView
 	, public MessageListener<MessageForceEnterLicense>
+	, public MessageListener<MessageLoadProject>
 	, public MessageListener<MessageProjectEdit>
 	, public MessageListener<MessageProjectNew>
-	, public MessageListener<MessageShowStartScreen>
 {
 public:
 	QtMainView();
@@ -55,9 +55,9 @@ public:
 
 private:
 	void handleMessage(MessageForceEnterLicense* message);
+	void handleMessage(MessageLoadProject* message);
 	void handleMessage(MessageProjectEdit* message);
 	void handleMessage(MessageProjectNew* message);
-	void handleMessage(MessageShowStartScreen* message);
 
 	std::shared_ptr<QtMainWindow> m_window;
 	std::vector<View*> m_views;