alert message on hook fields

[amandine16]

Hello, I couldn't find in the documentation, but it would be great to be able to display different and customizable messages on the collection's update hooks.

For example, when we update a collection, we could display a standard personalized message: "Update done, an email has been sent to the client...", instead of the standard pop-up message indicating that the collection has been updated.

Also, it would be interesting to obtain more information on the error messages displayed on the client side in these same pop-ups, specifying the label of the field and the error encountered 'client name: error = required field not filled '

Thank you very much, your work is top it's really a super super adaptive CMS !!