Applied some formatting to Editor quit confirmation-with-maps-open me…

…ssage

src/editor/controller/editor_controller.cpp

@@ -214,7 +214,7 @@ bool editor_controller::quit_confirm()
 		message = _("Do you really want to quit? Changes in the map since the last save will be lost.");
 	} else {
 		message = _("Do you really want to quit? The following maps were modified and all changes since the last save will be lost:");
-		message += modified;
+		message += "\n" + modified;
 	}
 	return quit_confirmation::show_prompt(message);
 }

src/editor/map/context_manager.cpp

@@ -130,7 +130,7 @@ size_t context_manager::modified_maps(std::string& message) {
 		}
 	}
 	BOOST_FOREACH(std::string& str, modified) {
-		message += "\n" + str;
+		message += "\n" + std::string("• ") + str;
 	}
 	return modified.size();
 }