Peter Spicer edde68e078
MDL-67428 navigation: Apply navigation text filters at system context
On some larger sites, processing the navigation with format_string will
habitually load all the contexts for navigation which can take 400+ DB
queries. Explicitly tying all those format_string calls to the system
context reduces this overhead to a single DB query that probably has
already been run on the page previously.

Co-authored-by: Peter Burnett <peterburnett@catalyst-au.net>
2022-03-04 14:36:25 +10:00
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