EditorSettings: Default game window placement to Centered.

Fixes #8890

editor/editor_settings.cpp

@@ -619,7 +619,7 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 
 	set("editors/poly_editor/point_grab_radius", 8);
 
-	set("run/window_placement/rect", 0);
+	set("run/window_placement/rect", 1);
 	hints["run/window_placement/rect"] = PropertyInfo(Variant::INT, "run/window_placement/rect", PROPERTY_HINT_ENUM, "Default,Centered,Custom Position,Force Maximized,Force Full Screen");
 	String screen_hints = TTR("Default (Same as Editor)");
 	for (int i = 0; i < OS::get_singleton()->get_screen_count(); i++) {