Adds polling function to pipelines table

Closes #5983

See merge request !10210

Update Prometheus documentation for 9.1

See merge request !10516

Stop new merge request page tabs updating the URL

Closes #30419

See merge request !10471

Removes unused code

See merge request !10456

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Closes #24784

See merge request !10503

Add keyboard shortcuts to main menu.

Closes #30036

See merge request !10243

Button capitalisation

Closes #18931

See merge request !10418

Fix container going full-width when switching from "Side-by-side" "Changes" MR tab before done loading

Closes #29193

See merge request !10172

Updated JS that was causing the hints to appear & then disappear

1. Show shortcuts for easy navigation.

Also poll for pipeline changes on:
 - Pipeline table on commit page
 - Pipeline table on merge request page
 - Pipeline table on new merge request page