Issue #2082315 by Wim Leers, realityloop, mrjmd: Tracker history markers ("new" and "updated" markers, "x new replies" links) forces render caching to be per user

Issue #1996238 by sun, nod_, damiankloip, Wim Leers, longwave, alexpott, Xano, mdrummond, Mark Carver, Jeff Burnz, highrockmedia, joelpittet, et al: Replace hook_library_info() by *.libraries.yml file.