Issue #2329009 by znerol: Fixed SummaryLengthTest::testSummaryLength() must not alter WebTestBase::loggedInUser.

Issue #1974048 by Gábor Hojtsy, vijaycs85, er.pushpinderrana, Sutharsan, penyaskito, bserem: Fixed Limited display of languages when going back in installer is confusing.

Issue #2121713 by tim.plunkett, dawehner, rteijeiro, jiv_e: Move drupal_html_id() and drupal_html_class() to Drupal\Component\Utility.

Issue #2329303 by tim.plunkett, dawehner: Fixed Use the right request when determining the theme on a 403 page.

Issue #1966436 by naveenvalecha, cesarmiquel, Berdir, mr.york, jlbellido, segi, vasi1186, Leksat, Gábor Hojtsy, Schnitzel, grisendo, Aron Novak, likin, penyaskito, vijaycs85, kfritsche, fago: Fixed Default *content* entity languages are not set for entities created with the API.

Issue #2213899 by dawehner, joelpittet: Remove global $user wherever possible (outside bootstrap and authentication) Round 2.

Issue #2295469 by Cottser, dawehner | effulgentsia: Add support for static permission definitions with *.permissions.yml.

Issue #2318801 by jarsenx, mbrett5062: Breakpoint Module: Fix documentation that refers to enabling/disabling of modules.

Issue #2301245 by sun, joelpittet | larowlan: Fixed Entity system invokes non-existing theme hooks: 'Theme hook  not found.'

How about a *sensible* commit message? ;)

This reverts commit 1a10539f.

Issue #2030591 by jibran, Temoor, andypost, lokeoke, er.pushpinderrana, martin107, pcambra, piyuesh23, Sharique, kgoel | plopesc: Expand ContactForm with methods.

Issue #2303521 by swentel, larowlan | alexpott: Fixed CommentTypeForm allows the entity type to be changed.

Issue #2323259 by Sutharsan, vijaycs85, Gábor Hojtsy: Fixed Local translation file detection is not semantic version compatible.

Issue #2313931 by Berdir: Merge ['controller'] with ['build_info']['callback_object'] and add a method for it.

Issue #2250841 by andypost, thechanceg, Buratino42 | vijaycs85: Fixed Adding a inline template for content translation status.

Issue #2325977 by Gábor Hojtsy: Fixed All links lead to same entity translations in translation overviews.