Bug fixes

Prevent Feeds warnings about missing 'source' key.

Small but useful improvement on the wording used in the submodule toc_js_per_node.

#3012941 : Improve wording of "ToC per node default value" setting

1. Drupal - Should close the popup when click 'No, thanks' in oauth page.
2. Drupal - “+ insert files from Canto” hover should change to hand icon.
3.Drupal - First line button should change hover icon for more light.

* Add debug mode.
* Better error handling.

Swagger UI for OpenAPI UI Release Candidate 3. This is a bug fix release and doesn't provide any new features.

Fixes issue with the swagger css files not being loaded.

bug fixes and fewer php notices.