Issue #3278493 by mglaman, rabbitlair, mherchel, Purencool, dww, benjifisher, lauriii, andy-blum, AdamPS, jwilson3, alexpott, smustgrave, rlahoda, akalata, ckrina, bnjmnm, crasx, mndonx, hbrokmeier, callinmullaney: Make it easier for theme builders to enable Twig debugging and disable render cache

(cherry picked from commit da2eaec5)

Issue #2902310 by kiruba karan, Yogesh Pawar, nyph1337, Purencool, droplet, Eric115, xjm, if-jds: Add bottom padding to off-canvas dialog

Issue #1845286 by shameemkm, purencool, webchick: Bogus reference to field_ui_field_overview_form_validate()/submit in docs.

Issue #1431076 by c960657, nod_, purencool, Nor4a: Fixed Overlay does not work with prefixed URL paths .