publish: warns user in app when konnector has encounted an error

generated from commit b48600fd

index.html

@@ -6,4 +6,4 @@
           .then((reg) => console.log('Success: ', reg.scope))
           .catch((err) => console.log('Failure: ', err));
           }
-      })</script><div role="application" class="application" data-cozy-token="{{.Token}}" data-cozy-domain="{{.Domain}}" data-cozy-locale="{{.Locale}}" data-cozy-app-name="{{.AppName}}" data-cozy-app-slug="{{.AppSlug}}" data-cozy-app-name-prefix="{{.AppNamePrefix}}" data-cozy-app-editor="{{.AppEditor}}" data-cozy-icon-path="{{.IconPath}}"><script src="vendors/ecolyo.4a154783a007a4aba589.js"></script><script src="app/ecolyo.97def7f67230efc8b2b7.js"></script></div></body></html>
\ No newline at end of file
+      })</script><div role="application" class="application" data-cozy-token="{{.Token}}" data-cozy-domain="{{.Domain}}" data-cozy-locale="{{.Locale}}" data-cozy-app-name="{{.AppName}}" data-cozy-app-slug="{{.AppSlug}}" data-cozy-app-name-prefix="{{.AppNamePrefix}}" data-cozy-app-editor="{{.AppEditor}}" data-cozy-icon-path="{{.IconPath}}"><script src="vendors/ecolyo.4a154783a007a4aba589.js"></script><script src="app/ecolyo.90bb7110e8929fc79b54.js"></script></div></body></html>
\ No newline at end of file