Enhancement: suggest changes on articels and comments of other users

[zukunft]

Allow to suggest changes on articles and comments of other users.

Some users seem more typo mistakes the other and they like to suggest the corrections to the author. The suggested setup is:

1. Should all users have the possibility to suggest changes: No, because this would make the interface more complex and most of the users are not expected to use this function.
2. Should the corrector role be assigned by the admin only: No, because the correction should not be live directly. Instead the author should receive a message with the suggested changes.
3. Should the author have the possibility to confirm change by change: Yes, because it is expected that not so many correction will be suggested.

Steps to implement:

1. Add a new role "corrector" if it does not yet exists and allow each user to switch on the role
2. If the user has the corrector role, *all articles and comments have the change icon
3. if an article or comment is changed and the changer is not the author, the changes are detected change by change and send to the author as a single change request
4. in the inbox of the author the suggested changes can be confirmed change by change and once confirmed the article or comment is changed according to the suggestion
5. The author can also reject a change and comment, why he rejected it. This message is send to the inbox of the corrector.

The change message should contain a link to the article or comment, the sentence with the suggested change, plus one sentence before and after. The author should have a selector to confirm or reject the change and a text field for a comment. All suggested changes are shown in a paged list and with a confirm button the accepted or rejected changes are archived and show in a separate list.

[tpreusse]

Thank you for this idea @zukunft

I think suggesting corrections is definitely something we should explore. I personally would imagine a simpler solution initially for articles: a small report error button at the end for all signed in users. But eventually we should make it more elaborate and consider it for the dialog too.