Issue #2501481 by Cottser, davidhernandez, kfriend, alimac, YesCT, lauriii, tim.plunkett, cilefen, lbainbridge, porchlight: form_select_options() is a theme function in disguise and should not use SafeMarkup::set

Issue #1898444 by jenlampton, Cottser, lbainbridge, duellj, joelpittet, scor: Rdf.module - Convert theme_ functions to Twig.

Issue #1898460 by pixelmord, bstoppel, steveoliver, jenlampton, johnnygamba, jastraat, Cottser, lbainbridge, myke, thedavidmeister, c4rl, joelpittet, ezeedub: Convert taxonomy module to Twig.

Issue #1549506 by swentel, pcambra, lbainbridge, muriqui: Fixed Edit and delete links should be hidden for locked fields.