[HelpHub] Images from CDN are not opening by link after clicking on them in HelpHub articles in attending to zoom them #371

Issue Description

Screenshots need update as described on trac ticket #5559

Suggested Fix

Notes from Trac ticket:

Having wp-helphub.com in the content has been an ongoing problem..
Here's a list of all the articles which contain it:
https://wordpress.org/support/?p=10851459 before-you-create-a-network edit
https://wordpress.org/support/?p=10841662 common-wordpress-errors edit
https://wordpress.org/support/?p=10450778 creating-a-search-page edit (Invalid blocks, missing image)
https://wordpress.org/support/?p=10849381 settings-general-screen edit
https://wordpress.org/support/?p=10851309 settings-permalinks-screen edit (Updated image reference, still has internal glossary links to wp-helphub)
https://wordpress.org/support/?p=10848222 settings-writing-screen edit (Missing images)
https://wordpress.org/support/?p=10851401 test-driving-wordpress edit (Missing image? references wp-helphub image)
https://wordpress.org/support/?p=10863612 twenty-fifteen edit
https://wordpress.org/support/?p=10840288 twenty-sixteen edit (Missing images)
https://wordpress.org/support/?p=10778661 users-your-profile-screen edit
https://wordpress.org/support/?p=10813583 wordpress-backups edit (Updated reference, has HTML in content?)
https://wordpress.org/support/?p=10776396 writing-posts edit (Internal link to wp-helphub)

Find-replace unfortunately doesn't work, as the needs to be updated interactively to link to the correct content.

(edit: I fixed some of them, crossed out above, notes on the remaining few that need someone on the docs team to update)