Issue #2361809 by rpayanm, nlisgo: Remove usage of drupal_strtoupper().
Issue #2282673 by stevepurkiss, ParisLiakos, mgifford: Add a PHPunit test for not using Drupal\Core code in Drupal\Component.
Revert "Issue #2358685 by Aleksandar_P | LewisNyman: Remove edit and configure icons from misc."

This reverts commit 39aeee85c2341287746506b726f378748056ba11.