Fix update notification on latest foss version of ckeditor 4.22.*.

[corentinbettiol]

Hi. Ckeditor started to show a notification yesterday:

It's a problem because it shows on every ckeditor box, even the ones who are part of a form on a public-facing website: every visitor of the site will see this.

Since we can't use versions 4.23+ (those are lts versions, which needs a license key to work, they changed the license), what we can do as a temporary fix is simply remove the notification process on the ckeditor code (gnu gpl3, we're allowed to make changes to the program).

[matthiask]

https://github.com/django-ckeditor/django-ckeditor/commit/d1cd092b4fbfb0534ded7f09a219d89fea5e547f Here's a different fix. All you have to do is versionCheck:false in the configuration. That being said, 4.22.1 is already known to be insecure, therefore hiding the notification isn't really fixing anything.

[fsbraun]

@matthiask Thank you very much for the hint!! I like the system check warning.

[corentinbettiol]

Thank you for this fix @matthiask!

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This will now be closed due to inactivity, but feel free to reopen it.