f959ed5916
This adds preview localizations for remaining Firefox Suggest strings. I removed support for `payload.helpTitle` and `sponsoredText`. The `helpTitle` code comment says it's useful for experiments with hardcoded strings, but we're not shipping experiments as extensions anymore, and in-tree experimental/ in-development features should use preview localizations AFAICT. Covered by existing tests: * browser/components/urlbar/tests/browser/browser_helpUrl.js * browser/components/urlbar/tests/browser/browser_quickSuggest* * browser/components/preferences/tests/browser_searchQuickSuggest.js Depends on D122550 Differential Revision: https://phabricator.services.mozilla.com/D123032