Issue #3013802 by andregp, yogeshmpawar, gaurav.kapoor, nikitas, Charlie ChX Negyesi, SourabhBhalerao, alexpott, joachim: Improve error message on unrouted URLs

(cherry picked from commit 83e1686b)

Issue #3275093 by larowlan, catch, bbrala, dww, heddn: Drupal 9.3.0 dumps were created with PHP 8, needs to be PHP 7.3

Issue #3245720 by hooroomoo, nod_, Wim Leers, lauriii, yash.rode: [drupalMedia] Support choosing a view mode for <drupal-media>

Issue #3173180 by heddn, edysmp, chrisfree, andypost, markdorison, anmolgoyal74, kiwimind, rkoller, ranjith_kumar_k_u, catch, nod_, Fabianx, prudloff, larowlan, quietone: Add UI for 'loading' html attribute to images

Issue #3268318 by lauriii, Wim Leers, tim.plunkett: [drupalMedia] <a> with GHS allowed attributes downcast wraps data-caption with <a>

Revert "Issue #3173180 by heddn, edysmp, chrisfree, andypost, markdorison, anmolgoyal74, kiwimind, rkoller, ranjith_kumar_k_u, nod_, Fabianx, prudloff, quietone: Add UI for 'loading' html attribute to images"

This reverts commit 9de5949b.

Issue #3210435 by javi-er, kostyashupenko, sagarchauhan, mherchel, bnjmnm, Kristen Pol, ckrina, saschaeggi: Consistent Navigation violation with secondary tabs

Issue #3269341 by mherchel, KurtTrowbridge: Claro <details> element not rendering properly in forced colors

Issue #3269417 by mherchel, cindytwilliams: Claro: Breadcrumb divider icon not always visible in forced colors

Issue #3130305 by mherchel, cindytwilliams, bnjmnm, saschaeggi, andrewmacpherson: Ensure all of Claro's background images are visible in forced colors mode

Issue #3272722 by Lendude: The deprecation message for taxonomy_term_load_multiple_by_name() is incorrect, it should use taxonomy_term and not taxonomy_vocabulary

Issue #3173180 by heddn, edysmp, chrisfree, andypost, markdorison, anmolgoyal74, kiwimind, rkoller, ranjith_kumar_k_u, nod_, Fabianx, prudloff, quietone: Add UI for 'loading' html attribute to images

(cherry picked from commit 3cbed38c)

Issue #3266397 by quietone, murilohp, dww, AaronMcHale, benjifisher, Antoniya, andregp, rkoller, kimberlly_amaral, ckrina: Highlight non-stable modules on the admin/modules/uninstall form

(cherry picked from commit 62c91e97)

Issue #3067299 by andypost, iyyappan.govind, quietone, mrinalini9, benjifisher, ravi.shankar, yogeshmpawar, longwave, danflanagan8: Move actions migrations and tests to system module

Issue #3259188 by alexpott, dww, chr.fritsch: Extend post update system to provide themes a way to install newly-required dependencies

(cherry picked from commit 5f5c8114)

Issue #3263935 by huzooka, danflanagan8, quietone: system_site migrates default 403, 404 and front page paths as forward slash (/)

(cherry picked from commit 914fadac)

Issue #3265626 by bnjmnm, Wim Leers, nod_, lauriii, alexpott, andregp: Changes to "Manually editable HTML tags" lost if form is submitted without triggering AJAX

(cherry picked from commit 9117ebf1)

Issue #3258931 by nod_, hooroomoo, xjm, catch, effulgentsia, Wim Leers: Deprecate backbone and tag it internal

Issue #3203604 by Eli-T, snig, justafish, kuldeep_mehra27, Matroskeen, Finn Lewis, shaal, ckrina, dawehner, diarcastro: Add a new recipe to Umami - Borscht with pork ribs

(cherry picked from commit 59901155)

Issue #3270940 by quietone: Move all non migration Color tests to the module in preparation of removal

(cherry picked from commit 25d335d5)

Issue #2807241 by Stefdewa, jhodgdon, Lendude, droplet, pjbaert, alexpott: Funky code in Views UI to make Add display list doesn't work in non-English languages

(cherry picked from commit 8ecb3da5)

Issue #3273527 by joevagyok, Wim Leers: Upgrade path never configures the ckeditor5_heading plugin to allow <h1>

(cherry picked from commit a1244cef)

(cherry picked from commit 999bfe59)

Issue #3272797 by bnjmnm, phenaproxima, xjm: [random test failure] Restore LayoutBuilderTest::testConfigurableLayoutSections()

(cherry picked from commit ce4e8fa3)

Issue #3273312 by Wim Leers, Dom., ifrik, mpp, seanB, lauriii: Upgrading from CKEditor 4 for a text format that has FilterInterface::TYPE_MARKUP_LANGUAGE filters enabled

(cherry picked from commit e8ed42cc)

Issue #3273332 by Wim Leers, DieterHolvoet: Merging cells in tables is possible in UI, but lost upon saving

(cherry picked from commit 28bdfa26)

Issue #3273626 by xjm, dww, Spokje: Drupal Media JavaScript test suite causes database locks on SQLite

(cherry picked from commit 4990c413)

Issue #3265929 by jonathanshaw, yogeshmpawar, quietone, xjm: Rewrite examples of form options to be less culturally specific

(cherry picked from commit 5d2d2817)

(cherry picked from commit aef3d901)

Issue #3112547 by andypost, dww, yogeshmpawar, Lendude, bnjmnm, danflanagan8, mglaman, joachim: Views UI tests should not rely on Classy

(cherry picked from commit 38ad49db)

(cherry picked from commit b2f2bc1e)

(cherry picked from commit a5eec7f1)

Issue #3268105 by murilohp, bbrala, catch, TR, Spokje: Bring back RestRegisterUserTest into user module (without HAL)

(cherry picked from commit f73d11adc5bae3ec2b0e6467e3a4d888f9e436f8)

Issue #3268443 by danflanagan8, ravi.shankar, dww, longwave: Configuration Manager (config) tests should not rely on Classy

(cherry picked from commit 58b15e19)

(cherry picked from commit ef6aebf2e030b4d58b88d16845a3dde095e7e8fd)