Issue #3332593 by phenaproxima, Wim Leers, borisson_, lauriii, tim.plunkett: Adopt PluginExists validator in relevant places

Issue #3404431 by claudiu.cristea, Wim Leers, borisson_, quietone: Filter settings schema types are incorrect

Issue #3341682 by Wim Leers, phenaproxima, borisson_, catch, alexpott: New config schema data type: required_label

Issue #3361534 by Wim Leers, borisson_, longwave, catch: KernelTestBase::$strictConfigSchema = TRUE and BrowserTestBase::$strictConfigSchema = TRUE do not actually strictly validate

Issue #2920678 by phenaproxima, Wim Leers, dawehner, Gogowitsch, Sam152, dww, longwave, yogeshmpawar, alexpott, borisson_, tstoeckler, jibran, amateescu, larowlan, tedbow: Add config validation for the allowed characters of machine names

Issue #3212351 by heddn, ravi.shankar, catch, Fabianx, Graber, lauriii, Chi: Lazy load OEmbed formatter

Issue #2852557 by bircher, alexpott, longwave, nedjo, dww: Config export key order is not predictable, use config schema to order keys for maps

Issue #3073535 by oknate, webchick, Wim Leers, phenaproxima, seanB, AaronMcHale: Allow only a subset of the media library to be exposed to CKEditor

Issue #3074608 by oknate, Wim Leers, phenaproxima, seanB, marcoscano, larowlan, FeyP: Optionally allow choosing a view mode for embedded media in EditorMediaDialog

Issue #3017935 by chr.fritsch, Wim Leers, alexpott, phenaproxima: Media items should not be available at /media/{id} to users with 'view media' permission by default

Issue #2831944 by chr.fritsch, phenaproxima, alexpott, marcoscano, slashrsm, seanB, robpowell, samuel.mortenson, tstoeckler, Wim Leers, dawehner, martin107, Gábor Hojtsy, aheimlich, tedbow, mtodor, larowlan, idebr, bkosborne, ckrina: Implement media source plugin for remote video via oEmbed

Revert "Issue #2831944 by chr.fritsch, phenaproxima, marcoscano, seanB, slashrsm, robpowell, alexpott, samuel.mortenson, dawehner, tstoeckler, Wim Leers, Gábor Hojtsy, martin107, aheimlich, idebr, tedbow, larowlan, ckrina, mtodor, bkosborne: Implement media source plugin for remote video via oEmbed"

This reverts commit 8f6fcbdd.

Issue #2831944 by chr.fritsch, phenaproxima, marcoscano, seanB, slashrsm, robpowell, alexpott, samuel.mortenson, dawehner, tstoeckler, Wim Leers, Gábor Hojtsy, martin107, aheimlich, idebr, tedbow, larowlan, ckrina, mtodor, bkosborne: Implement media source plugin for remote video via oEmbed

Issue #2924631 by marcoscano, starshaped, chr.fritsch, xjm, phenaproxima, Gábor Hojtsy, seanB, yoroy, evankay: Media sources for local video and audio support

Issue #2831937 by mtodor, seanB, Wim Leers, phenaproxima, l0ke, webflo, tedbow, Gábor Hojtsy, slashrsm, naveenvalecha, mondrake, oriol_e9g, dawehner, vijaycs85: Add "Image" MediaSource plugin

Issue #2831936 by marcoscano, seanB, chr.fritsch, l0ke, Wim Leers, vijaycs85, phenaproxima, pguillard, johndevman, drubb: Add "File" MediaSource plugin

Issue #2831274 by slashrsm, seanB, Wim Leers, chr.fritsch, phenaproxima, naveenvalecha, marcoscano, webflo, Gábor Hojtsy, amateescu, Boobaa, iMiksu, mtodor, effulgentsia, xjm, Berdir, tim.plunkett, dawehner, tkoleary, tstoeckler, tedbow, alexpott, yoroy, catch, Bojhan, andypost, jhedstrom, jibran, aspilicious, boztek, cbr, bigbaldy, alex0412, dagmar, blueminds, ekes, Dave Reid, Sam152, bojanz, pixelmord, jonathanshaw, CTaPByK, webchick, samuel.mortenson, dbt102, dishabhadra, proweb.ua, rakesh.gectcr, rasikap, paranojik, pameeela, neardark, NormySan, Primsi, nicolas.rafaelli, romainj, royal121, vladan.me, vpeltot, woprrr, vilepickle, toni04, scheban, tduong, temkin, tim-e, mbovan, mashermike, felribeiro, giancarlosotelo, hctom, euphoric_mv, eric.duran7@gmail.com, edurenye, eelkeblok, H1ghlander, Jaesin, hkirsman, ja_ca, NickWilde, joachim, joshi.rohit100, marcingy, NerOcrO, Mixologic, jcisio, jfrederick, Lukas von Blarer, Maouna: Bring Media entity module to core as Media module