function _onChangeProjectOwner() {
            var sType = $("#project-owner option:selected").data("type");

            if (sType == "user") {
                if ($("#protected").is(":checked")) {
                    $("#public").prop("checked", true);
                }
                htElement.welProtected.hide();
            } else {
                htElement.welProtected.show();
            }
        }
We don't know whether the user want to check this or not
because this checkbox will be hidden. So we let it be true
forcely. It may be misguessing of the user's choice but it
prevents the possibiltiy that the user never knows the
existence of PullRequest feature when the user changes the 
project setting to use Git.