Issue #2317981 by benjifisher, ohthehugemanatee, larowlan, andypost, ByronNorris, AaronMcHale, smustgrave, dawehner, rkoller: Move block content edit and delete routes under admin/content/block to improve IA for editors and fix breadcrumbs

Issue #2486409 by emma.maria, _KurT_, rachel_norfolk, Manjit.Singh, andile2012, LewisNyman, hussainweb, BrightBold, ByronNorris, John Cook, lauriii: Clean up the "Search" component in Bartik

Issue #2392109 by jacob.embree, dcmul, ByronNorris, jhedstrom: Filter: Allow plus sign in email addresses