Issue #1965510 by TR, shanethehat, DyanneNova: Fix punctuation in Taxonomy module tests' assertion sentences.
Issue #2137947 by tim.plunkett, damiankloip: Finish unit tests for PluginBag and subclasses.
Issue #2120841 by tim.plunkett: Convert form_options_flatten() to a method on FormBuilder.
Issue #2142123 by pcambra: Adapt moveChildren function to match its interface.
Issue #2140051 by damiankloip: Remove views_cache_get/set functions.
Issue #2139195 by tstoeckler: Remove left-over entries in entity_menu().
Issue #2140803 by Xano: Hook_config_translation_info(_alter)() docblock references incorrect YAML file.
Revert "Rollback of Issue #2138239 by damiankloip, tim.plunkett, amateescu: Use GlobIterator instead of glob. — breaks testbot."

Un-committing the un-commit of the previously committed commit. :P

This reverts commit 40e903f89794e1cf99af881c8292ad1937c77379.
Issue #2137063 by tstoeckler: Remove ConfigTestTranslationUITest.
Issue #2107687 by vijaycs85: Provide configuration schema for Rest module.
Issue #2096373 by sushantpaste, jsbalsera, Sumeet.Pareek, gaurav.goyal: Provide config schema for View modes.
Issue #2104229 by claudiu.cristea: Deprecate file_usage().
Issue #2100509 by emma.maria, dcrocks, csakiistvan, Manjit.Singh: Password strength indicator for site maintenance account is aligned incorrectly on the installation screen.
Issue #2099205 by Wim Leers, zero2one, Gábor Hojtsy: When uploading and inserting an image trough the WYSIWYG plugin a relative path should be used for the image source (src) .
Issue #2142637 by swentel, Bojhan: Display only one Save button on content type creation.
Issue #2084665 by Xano, aschiwi, yoroy: Clean up the DB configuration during installation.
Revert "Issue #2104229 by claudiu.cristea: Deprecate file_usage()."

Temporary rollback since it conflicts with a critical issue.

This reverts commit ce08ea737c756a1922e7aadcfd85308c9d9e8e80.
Issue #2131851 by tim.plunkett: Form errors must be specific to a form and not a global.
Issue #1938884 by tim.plunkett, dawehner, Xano, Les Lim: Replace the fallback user listing with a list controller.
Issue #2021161 by dawehner, Xano, AjitS, tim.plunkett: Replace the fallback node listing with a list controller.