MP Create Game: escape any formatting applied to game name

This is a good point since it ensures any place that might use the title before the lobby
(don't think there's any such places right now) won't inadvertently get formatted.

Also might be worth looking into a way to just strip formatting completely.

(cherry-picked from commit 58a2e23)

src/gui/dialogs/multiplayer/mp_create_game.cpp

@@ -33,6 +33,7 @@
 #else
 #include "gui/widgets/listbox.hpp"
 #endif
+#include "font/pango/escape.hpp"
 #include "formatter.hpp"
 #include "formula/string_utils.hpp"
 #include "game_config.hpp"
@@ -948,7 +949,7 @@ void mp_create_game::post_show(window& window)
 		config_engine_->set_options(options_manager_->get_options_config());
 
 		// Set game name
-		const std::string name = find_widget<text_box>(&window, "game_name", false).get_value();
+		const std::string name = font::escape_text(find_widget<text_box>(&window, "game_name", false).get_value());
 		if(!name.empty() && (name != ng::configure_engine::game_name_default())) {
 			config_engine_->set_game_name(name);
 		}