Fix a help dialog that appears in the top-left

src/dialogxml/dialogs/dialog.cpp

@@ -533,6 +533,13 @@ void cDialog::run(std::function<void(cDialog&)> onopen){
 	makeFrontWindow(*parentWin);
 }
 
+void cDialog::runWithHelp(short help1, short help2) {
+	extern void give_help(short help1, short help2, cDialog& parent);
+	run([help1, help2](cDialog& me) -> void {
+		give_help(help1, help2, me);
+	});
+}
+
 // This method is a main event event loop of the dialog.
 void cDialog::handle_events() {
 	sf::Event currentEvent;

src/dialogxml/dialogs/dialog.hpp

@@ -115,6 +115,8 @@ public:
 	/// Show the dialog and start its event loop. All dialogs are modal.
 	/// @param onopen A function to be called after the dialog is displayed but before the event loop starts.
 	void run(std::function<void(cDialog&)> onopen = nullptr); // cd_run_dialog
+	/// Show this dialog. Before starting its event loop, show a help window if it hasn't been shown before.
+	void runWithHelp(short help1, short help2);
 	/// Get the result of the dialog.
 	/// @tparam type The result type.
 	/// @throw boost::bad_any_cast if the provided result type is different from the type set by setResult().