Issue #2687843 by quietone, heddn, Jo Fitzgerald, alexpott, piggito, mallezie, mikeryan, xjm, phenaproxima, benjifisher, webchick, Gábor Hojtsy, masipila, benjy, abhishek-anand, catch: Add back incremental migrations through the UI

Issue #2281691 by xjm, mikeryan, Gábor Hojtsy, alexpott, tim.plunkett, webchick, abhishek-anand, quietone, yoroy, stevepurkiss, benjy, Bojhan, Ryan Weal, aleksip, anavarre, hussainweb, er.pushpinderrana, cilefen, Luukyb, Jo Fitzgerald: User interface for migration-based upgrades

Issue #2388941 by vijaycs85, mrjmd, abhishek-anand, dawehner, alexpott: Correction needed for hook_views_query_alter in views.api.php