Issue #2166065 by alexpott, mtift: Replace config_install_default_config with ConfigInstaller service.
Issue #2169101 by penyaskito, chx: Improve docs in MigrateSqlSourceTestCase
Issue #2171015 by alexpott: Drupal 8 HEAD broken: installing Language module fails, after that cannot install any other module.
Issue #1705618 by nod_, sun, clemens.tolboom, Wim Leers: Double click prevention on form submission.
Issue #952394 by xjm, webchick, sun, catch: 'No available releases found' - fetching update information exceeds timeout.
Issue #2155701 by sun: Installer starts with fatal error/exception 'table 'semaphore' not found' if settings.php contains  already.
Issue #2171015 by webchick: fixed some language/documentation issues.
Issue #2147451 by dawehner: ContainerBuild has to ensure synchronized services.
Issue #2144919 by yched, fago, effulgentsia, amateescu, tstoeckler, chx, larowlan, swentel: Allow widgets and formatters for base fields to be configured in Field UI.
Issue #2154701 by pfrenssen, Gábor Hojtsy, swentel: Regression: Contextual links broken, tabs erroneously added after enabling content translation module.
Issue #2167507 by andypost, chx, sun, dcrocks: Fix rowCount query usage in pgsql and sqlite drivers.
Issue #2015689 by smiletrl, jsacksick, mradcliffe, effulgentsia, nick_daffodil, stevector | swentel: Convert field type to typed data plugin for options module .
Issue #2087393 by amateescu: Remove LegacyField once all field types converted.
Issue #2171071 by jessebeach, Wim Leers: Remove drupal_add_library().
Issue #2161397 by dawehner, Crell: Update to Symfony 2.4.1.
Issue #2170085 by Wim Leers, jessebeach: Caption filter may not wrap images that are only aligned, not captioned.
Issue #2172717 by andypost, tim.plunkett: Missing local tasks on the 'Manage form display' page.
Issue #2171737 by vijaycs85, Wim Leers, claudiu.cristea: Regression: Draggable table broken on image style form.
Issue #1279652 by wiifm, Gábor Hojtsy: Add title search feature on the node listing admin page.
Issue #2161727 by jrockowitz, damiankloip, dawehner: Views that use fields with long names (ie 32 characters) will throw a show-stopping error.