T208770: Ensure TitleBlacklist applies when the context is an MCR page

Phabricator Link	T208770
Status	resolved
Priority	normal (orange)
Author	[1]
Owner	Jdforrester-WMF (James D. Forrester)
Projects	TitleBlacklist (Backlog) Multimedia (Untriaged) Multi-Content-Revisions (Done) Core Platform Team Legacy (Watching / External) CPT Initiatives (MCR) Structured Data Engineering (Verify on Production)
Subtasks
Parent Tasks	T189220: Ensure that relevant extensions are MCR-aware
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