Code review comment for lp://staging/~cjohnston/ubuntu-ci-services-itself/1290790

197 + } catch (e) {
198 + Y.webui.package_table.showMessage(json_error_msg);
199 + return;
200 + }

209 + failure: function (tx, r, e) {
210 + console.log("failure: ", tx, r, e);
211 + }

I'd use showMessage in both of these cases.