It contains:
- Fix drop zone indicators for non blocks.
- Fix archives block render function.
- Code block: preserve indentation on paste.
- Turn off autocomplete for token input.
- Fix parent post selector: ensure initial value available, search performed, all results shown.
- Fix gallery block undo issue.
Props isabel_brison.
Fixes#51640.
Built from https://develop.svn.wordpress.org/trunk@49324
git-svn-id: http://core.svn.wordpress.org/trunk@49085 1a063a9b-81f0-0310-95a4-ce76da25c4cd