Issue #3450125: Fix CKEditor issue with long source link in the source mode

Serhii Myronetsrequested to merge
bugfix/3450125-ckeditor-issue into 2.5.x

Ticket: https://getopensocial.atlassian.net/browse/PROD-28398

before: Screenshot_2024-05-27_at_15.14.54

after: Screenshot_2024-05-27_at_15.56.30

Edited by Serhii Myronets

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