Improvements - Fluid Topics - 5.3

Adds focus rings on buttons to improve accessibility.

Adds a new public web service to cancel a configuration backup restore operation, and adds error details to the Get configuration restore status web service.

Fixes an issue where the alt attribute of ressources would not be present in the Viewer page.

Keeps focus during page navigation.

Updates the Configuration management menu to beta version.

Forces the alt attribute on images in the Page designer.

Fixes an issue where some text fields would not have a correct background.

Automatically creates orgs when logging into Fluid Topics with correctly-configured SSO.