Issue #2512306 by StryKaizer, bojanz, googletorp, JeroenT, borisson_, tim.plunkett: Inline errors not shown for details elements

Issue #2536456 by mbovan, Berdir, Wim Leers, dawehner: Autocomplete is broken (its JS it not loaded)

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2226323 by kpv | danylevskyi: Fixed CompositeFormElementTrait causes identical HTML ids for element and its wrapper.

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).

Issue #675446 by mgifford, RobLoach, amateescu, nod_, longwave, oxyc, rteijeiro, tomyouds, Jelle_S, mcrittenden, Sutharsan, hansyg, Angry Dan, clemens.tolboom, droplet | Dave Reid: Change notice: Use jQuery UI Autocomplete.

Issue #2056627 by dawehner, tim.plunkett: Fixed Regression, Form API autocomplete is broken for routes.

Issue #1856178 by swentel, sun, ry5n: '#group' Form API property only works with <details> elements.

Issue #1238484 by mrfelton, ry5n, aspilicious, Bojhan, Xano, nod_, rootatwc, effulgentsia, chx, sun: Ability to mark the form buttons to be of a specific type (so that they can be styled differently).

Issue #1711070 by kid_icarus, tim.plunkett, xjm, droplet, zendoodles and cam8001: Convert tests to use ::$modules property instead of parent::setUp($modules).