Issue #1957346 by dawehner, olli, damiankloip, jibran, ParisLiakos: Add some settings on the block display to allow overrides on the block instance configuration.

Issue #1998582 by damiankloip, brantwynn, dawehner: Auto-generate machine_name() for Views Blocks using [viewname]_[displayname] rather than forcing manual entry.

Issue #1879774 by damiankloip, dawehner, effulgentsia: catch plugin exceptions for invalid views display plugins.

Issue #2006636 by tim.plunkett: Fixed menu_contextual_links() will always return a link to the MENU_DEFAULT_LOCAL_TASK, never the parent.

Issue #914382 by Wim Leers, Cottser, Gábor Hojtsy, franz, droplet, sun, Niklas Fiekas, catch, dawehner, effulgentsia: Fixed Contextual links incompatible with render cache.

Issue #1927608 by EclipseGc, tim.plunkett, effulgentsia: Remove the tight coupling between Block Plugins and Block Entities.

Issue #1829224 by alexpott, pfrenssen, vijaycs85, lirantal: Convert the 'theme_default()' variable to CMI.

Issue #1898804 by dawehner, tim.plunkett: Fixed Create a view block, place the block, delete the block, BOOM your site is dead.