Don't discard $WIDGETSTYLE

Calling a completion widget without passing the -w flag causes
$WIDGETSTYLE to be unset. This breaks logic in _oldlist, _list_files and
some plugins.

zsh-autosuggestions.zsh

@@ -231,7 +231,7 @@ _zsh_autosuggest_invoke_original_widget() {
 	shift
 
 	if (( ${+widgets[$original_widget_name]} )); then
-		zle $original_widget_name -- $@
+		zle $original_widget_name -w -- $@
 	fi
 }