Fix editors launching in the top left corner of the screen

src/scenedit/scen.main.cpp

@@ -163,7 +163,8 @@ void init_main_window (sf::RenderWindow & mainPtr, sf::View & mainView) {
 	;
 	
 	mainPtr.create(sf::VideoMode(width, height), "Blades of Exile Scenario Editor", sf::Style::Titlebar | sf::Style::Close);
-	mainPtr.setPosition({0,0});
+	sf::VideoMode desktop = sf::VideoMode::getDesktopMode();
+	mainPtr.setPosition({static_cast<int>((desktop.width - width) / 2), static_cast<int>((desktop.height - height) / 2)});
 
 	// Initialize the view
 	mainView.setSize(width, height);