Issue #1937266 by smustgrave, ravi.shankar, immaculatexavier, Berdir, Pavan B S, arunkumark, manuel.adan, kfitz, pixelcab, lokapujya: BlockContent entities uses delete method instead of pre/postdelete

Issue #2489450 by LewisNyman, marieke_h, kfitz, jcnventura, jibla, Bojhan, manauwarsheikh, matthodgson: Remove unnecessary focused/hover effects on details and vertical tabs

Issue #2513586 by kfitz, cilefen, jhodgdon, Bojhan, eliza411, ivanstegic, LewisNyman, lunk_rat, nickrosencrans, stpaultim, webchick: Remove the word "positive" from the "Must include a positive keyword with three characters or more." error message

Issue #2507911 by mikebell_, dylanf, naveenvalecha, deepakaryan1988, kfitz, jhodgdon, webchick, Charles Belov: Mention location of settings.php in UPGRADE.txt

Issue #2509694 by kfitz, joshi.rohit100, cilefen: The $name parameter for UrlGenerator::getRoute() is documented incorrectly