Issue #2809635 by markconroy, navneet0693, alexpott, smaz, larowlan, Eli-T, webchick, yoroy, ikit-claw, budda, kjay, timmillwood, tkoleary, Gábor Hojtsy, andrewmacpherson, lauriii, JayKandari, jibran, ok_lyndsey, big_man, ckrina, nathancz, Paul_Gregory, vijaycs85, SharJay, tomphippen, tim.plunkett, Tarun Lewis, cehfisher, kreynen, Petr Illek, mariohernandez, thamas, thatdamnqa, John Cook, philipnorton42, h2cm, kattekrab, martin_q, waako: Create experimental installation profile

Issue #1294264 by budda, davidwhthomas: FieldUpdateForbiddenException: Cannot update a list field - better debug info.

#41484 by nickl, flk, and budda. Don't wrap the category selection in a fieldset if there is only one vocabulary.

- Patch #60483 by budda, Morbus, webchick et al: hide contact tab for users who have option disabled.

- Patch #21918 by budda/Robin: forum icons are broken when you change the forum icon path.  TODO 1: the forum icons should probably be configurable on a per-site or per-theme basis. TODO 2: I spent 5 minutes looking for this setting.