Issue #2665152 by alexpott, Andrej Galuf, tfranz, longwave, andypost, jsimonis, bojanz: Simplify module form structure and fix bugs when Suhosin is used

Revert "Issue #2665152 by alexpott, Andrej Galuf, tfranz, longwave, jsimonis, andypost, bojanz: Certain modules can't be enabled when Suhosin is used"

This reverts commit 7f37114a.

Issue #2665152 by alexpott, Andrej Galuf, tfranz, longwave, jsimonis, andypost, bojanz: Certain modules can't be enabled when Suhosin is used

Issue #2716685 by Mile23: Part 2: Fix several errors in the 'Drupal.Commenting.DocComment' coding standard

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2598500 by krknth, nicrodgers: Remove unused variables from core/modules/toolbar/src/Tests/ToolbarAdminMenuTest.php

Issue #2503755 by Wim Leers, bobrov1989, webchick, dcrocks, andypost, emma.maria, catch, Bojhan, dawehner, Gábor Hojtsy, alexpott, tstoeckler, yoroy: Switch from user login block to login menu link and search block in standard profile

Issue #2557871 by alexpott: Remove all usages SafeMarkup::checkPlain() from template preprocess functions and attributes

Issue #2535118 by longwave, Wim Leers, borisson_, effulgentsia: Toolbar subtrees not working on admin pages due to lack of theme negotiation on Toolbar's custom JSONP route

Issue #2056089 by BarisW, TR, mgifford, rodvolpe, Dom., nambisolo, nod_, katewelling, Manjit.Singh, jhodgdon, Bojhan, Wim Leers: UI problems on the Modules/Extend page

Issue #2532490 by tim.plunkett, dawehner, Wim Leers, Crell, mtift: Unrouted URLs break toolbar but are hidden by caching

Issue #2217985 by Berdir, Wim Leers: Replace the custom menu caching strategy in Toolbar with Core's standard caching

Issue #2498689 by lauriii, Wim Leers, David_Rothstein: "Back to site" link no longer appears in the toolbar

Issue #2350837 by dawehner, Berdir, larowlan, Wim Leers: Convert most usages of EntityInterface::getSystemPath() to use routes

Issue #2040135 by Wim Leers, Berdir: Caches dependent on simple config are only invalidated on form submissions

Issue #2387973 by tibbsa, hussainweb: Clean-up toolbar module test members - ensure property definition and use of camelCase naming convention

Issue #2340251 by iMiksu, alexpott, tim.plunkett, dawehner, Wim Leers: Remove most remaining url() calls.

Issue #2340123 by Wim Leers: Setting cache tags can be tricky: use strings instead of nested arrays to improve DX.

Issue #2336177 by alexpott, YesCT: Fixed ConfigurableLanguage cannot be created/removed directly, integrate language_save() and language_delete().

Issue #2301317 by pwolanin, dawehner, Wim Leers, effulgentsia, YesCT, xjm, alexpott: MenuLinkNG part4: Conversion.

Revert "Issue #2301317 by pwolanin, effulgentsia, Wim Leers, dawehner, alexpott: MenuLinkNG part4: Conversion."

This reverts commit fd2db9cd.

Issue #2301317 by pwolanin, effulgentsia, Wim Leers, dawehner, alexpott: MenuLinkNG part4: Conversion.

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

Issue #2286403 by martin107: Inconsistent use of magic number when constants DIRECTION_LTR and DIRECTION_RTL already defined.

This reverts commit 07f63fe6.