[davlgd]

Resolves #2911

toUpperCaseLabels treats the label keys it encounters in plugin form schemas as display text. A form field can itself be named label, like the links items of the OtoroshiApiPortalCatalog plugin of otoroshi-api-portal:

"schema": {
  "label": { "type": "string", "label": "Label" },
  "url": { "type": "string", "label": "URL" }
}

The value under label is then the descriptor of that field, an object, and replace throws a.replace is not a function. loadData processes the schemas of the plugins listed in the designer before clearing its loading state, so such a plugin can block the designer even on routes that do not use it.

The helper now applies text formatting only to string values, and processes field descriptors recursively: the nested field keeps its own Label and the form renders it as a field. String and empty labels give the same result as before.

Checked on maif/otoroshi:18.0.0-jdk25 with a plugin that has this form: with the bundle of the image, the designer never loads; with the bundle built from this branch, it loads and renders the nested Label and URL fields.