Fix wikis cannot be edited in rich text on relative URL installations
What does this MR do and why?
Fix wikis cannot be edited in rich text
Changelog: fixed
Related issues:
- https://gitlab.com/gitlab-com/dev-sub-department/section-dev-request-for-help/-/issues/114
- #416667 (closed)
How to set up and validate locally
- Setup gitlab with a relative URL root.
- Edit a wiki page in rich text editor.
MR acceptance checklist
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I have evaluated the MR acceptance checklist for this MR.
Related to #416667 (closed)