Issue #2224581 by alexpott, larowlan, jhodgdon, mgifford: Delete forum data on uninstall.
Issue #2288793 by YesCT, jamesdixon, xq1003, fran seva, Les Lim: Add missing and fix some types in core docblocks and add some typehinting for locale module.
Issue #2360241 by martin107: Fixed MenuLinkManager uses PluginNotFoundException incorrectly.