Issue #1956134 by smustgrave, dawehner, larowlan, jibran, jbloomfield,...

Issue #1956134 by smustgrave, dawehner, larowlan, jibran, jbloomfield, lokapujya, Oscaner, elachlan, mgifford, olli, srilakshmier, Manuel Garcia, Nitin shrivastava, afeijo, alexpott, jgeryk, garphy, grisendo, jessebeach, xjm, joachim, tim.plunkett, andypost, Wim Leers, EclipseGc, damiankloip, benjy, klonos: Provide helpful editing links on "admin/structure/block" for deriver blocks (menu, views, block content, etc.)

(cherry picked from commit f8a34d34)
(cherry picked from commit 98887e87)