Profiles

Mentioned in [57010] on Core SVN:
Themes: Fix block theme supports being added too early, leading to Customizer live preview bugs in 6.4.

Mentioned in [57009] on Core SVN:
Themes: Fix block theme supports being added too early, leading to Customizer live preview bugs in 6.4.

Created ticket #59732 on Core Trac:
Theme live preview is broken

Created ticket #55952 on Core Trac:
add_option() racy behaviour

Created ticket #52470 on Core Trac:
Exported WXR contains terms twice

Created ticket #48795 on Core Trac:
Replace Video button in Video widget broken in 5.3