Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #2216161 by Wim Leers, alexpott, jhedstrom, borisson_, Berdir: Simplify performance settings page

SA-CORE-2018-001 by cashwilliams, catch, cilefen, droplet, dawehner, bonus, agentrickard, David_Rothstein, Chi, Gábor Hojtsy, Heine, Wim Leers, Schnitzel, drpal, effulgentsia, tedbow, tim.plunkett, tstoeckler, xjm, will_c, stefan.r, samuel.mortenson, larowlan, greggles, logaritmisk, mpdonadio, pwolanin, plach

Issue #2857857 by vegantriathlete, Jo Fitzgerald, snehi, plach, xjm, Skabbkladden: Check use of "it's" in core to ensure proper use

Issue #2923302 by MaskOta, tstoeckler, andrewmacpherson: Module install table is missing the "Show all columns" link

Issue #1472946 by gnuget, andypost, mmrares, sidharthap, kiamlaluno, Himanshu5050, dineshkumares, amit.drupal: Remove usages of deprecated function drupal_realpath() throughout core functions

Issue #2885309 by vaplas, drewklein, pk188, alexpott, Ayesh, arunkumark, andypost, klausi, xjm, mondrake: [PHP 7.2] each() function is deprecated

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

Issue #2482783 by dmsmidt, alexpott, mgifford, 20th, Sutharsan, Jo Fitzgerald, tim.plunkett, dandaman, xjm: File upload errors not set or shown correctly

Issue #2909368 by mfernea, reflie, zaporylie: Fix 'Drupal.Commenting.VariableComment.InlineVariableName' coding standard

Issue #2901739 by andriyun, Jo Fitzgerald, mfernea, xjm: Fix 'Squiz.Arrays.ArrayDeclaration' coding standard

Issue #1862892 by oriol_e9g, joseph.olstad, vaplas, G.I.Joe, leopathu, peterpoe, cilefen, xjm, larowlan: When a theme has a managed_file field and a submit callback, call to undefined function error is thrown

Issue #2892179 by Wim Leers, Berdir: Follow-up for #2775381: clearing render cache in PerformanceForm::submitForm() is obsolete

Issue #2781031 by chanchal2002, starshaped, joginderpc, alioso, brahmjeet789, Chernous_dn, Cottser, bandanasharma, Manjit.Singh, phenaproxima, tompagabor: Cron link on cron page overflows its background on smaller screens

Issue #2847651 by murrow, rachel_norfolk, john@johncook.me.uk, mpdonadio, BarisW, droplet, tstoeckler, andrewmacpherson, prabhu9484, ok_lyndsey, benjifisher, yoroy, lauriii, martin107: Improve timezones selector with optgroups

Issue #2801777 by Berdir, Wim Leers, Pol, alexpott, dawehner, Jo Fitzgerald, Munavijayalakshmi, poornima.n, ifrik, Bojhan, catch: Prevent drupal from deleting temporary files

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

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 #2509268 by joshi.rohit100, dmsmidt, tim.plunkett, willzyx, SKAUGHT, pfrenssen, left, mgifford, ok_lyndsey, TR, kattekrab, alexpott, bojanz, yched: Inline errors repeated on child elements in module uninstall form

Issue #2833462 by alexpott, tim.plunkett, Berdir: hook_requirements($phase = 'install') does not work as expected for experimental modules

Issue #2731861 by maxocub, felribeiro, aneek, alauzon, rajeshwari10, malavya, Sagar Ramgade, visabhishek, pashupathi nath gajawada, starshaped, quietone: Maintenance mode description shows wrong permission name

Issue #2688945 by tduong, amateescu, timmillwood, alexpott, joachim, xjm, yoroy, ifrik, Berdir, Gábor Hojtsy, Bojhan, webchick, cilefen, dawehner: Allow removing a module's content entities prior to module uninstallation

Issue #2048887 by pguillard, yoroy, Anul, rpayanm, meeli, ifrik, Bojhan, xjm: Cleanup user interface text on appearance/settings

Issue #2285311 by joelpittet, tomatkins, susannecoates: Theme's "Path to custom logo" always validated even if "Use the default logo" is set

Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' 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