Issue #2407739 by mortendk, davidhernandez, rteijeiro, lduerig, sivaji@knackforge.com: Remove classes from system templates r*.html.twig

Issue #2382513 by mikeker, chris_hall_hu_cheng, joachim, joelpittet, alexpott, YesCT, quietone, mikeker, Jeroen, joris_lucius, katy5289, sivaji@knackforge.com: Regression fix: allow Drupal 8 to work without Apache mod_rewrite

Issue #2407725 by mortendk, sivaji@knackforge.com, rteijeiro, Manjit.Singh: Remove classes from system templates d*.html.twig

Issue #2407733 by mortendk, rteijeiro, sivaji@knackforge.com: Remove classes from system templates i*.html.twig

Issue #2407745 by mortendk, rteijeiro, sivaji@knackforge.com: Remove classes from system templates t*.html.twig

Issue #2407735 by mortendk, sivaji@knackforge.com, hussainweb: Remove classes from system templates m*.html.twig

Issue #2407743 by mortendk, danquah, rteijeiro, davidhernandez, sivaji@knackforge.com: Remove classes from system templates s*.html.twig

Issue #2407729 by sivaji@knackforge.com, mortendk: Remove classes from system templates h*.html.twig

Revert "Issue #2407735 by mortendk, sivaji@knackforge.com: Remove classes from system templates m*.html.twig"

This reverts commit 2b9b727c.

Issue #2407735 by mortendk, sivaji@knackforge.com: Remove classes from system templates m*.html.twig

Issue #2407715 by crowdcg, davidhernandez, mortendk, sivaji@knackforge.com, Manjit.Singh, dernetzjaeger: Remove classes from system templates b*.html.twig

Issue #2226189 by alvar0hurtad0, sivaji@knackforge.com, mherchel, emma.maria, LewisNyman, tmjoseantonio: Style the modal in Bartik

Issue #1906264 by mgifford, mitsuroseba, blueminds, johanv, claudiu.cristea, kattekrab, amitgoyal, sivaji@knackforge.com: Required alt tag missing on image alt tag input

Issue #2349759 by davidhernandez, mortendk, rteijeiro, harish86, Sumit kumar, saki007ster, Mukeysh, brahmjeet789, nitishchopra, falkendk, Maninder, Vidushi Mehta, Ashish sandil, jitendra verma, crowdcg, sivaji@knackforge.com, dernetzjaeger: Copy system templates to Classy.

Issue #2394417 by hussainweb, tibbsa, sivaji@knackforge.com: Clean-up field_ui module test members - ensure property definition and use of camelCase naming convention

Issue #2396699 by hussainweb, sivaji@knackforge.com: Clean-up menu_ui module test members - ensure property definition and use of camelCase naming convention

Issue #2360175 by zaporylie, gaurav.goyal, droplet, sivaji@knackforge.com, mcdruid, nod_, er.pushpinderrana, brahmjeet789: Change .append(' ') with CSS style in system.admin.css