WordPress 5.9.1 Fix Update

On February 22 WordPress released an update with 33 fixes for the WordPress Core and 52 for Block Editor.

All Fixes:

• Twenty One: Editor Buttons margins incompatible with gap
• Default presets in use by default themes need to be updated
• Unnecessary database queries when a block theme isn’t in use
• Site transients cause DB errors when installing
• FSE Navigation Block Styling Submenu
• “Show hidden updates” button is invisible
• Cannot access ‘Manage menus’ in Navigation block toolbar when running a classic theme
• TT2: Blank screen displayed for custom post type
• PHP warning in `WP_REST_Global_Styles_Controller` if no `styles` exist in theme.json
• Media Library Overlay Drag-and-Drop To Reorder Images Does Not Work In WP 5.9
• Bounce hoverIntent.js version in script-loader to 10.1.2
• Check _get_cron_array type in upgrade_590 routine
• Standard post type UI is exposed for templates and template parts
• Twenty Twenty-Two: Theme Check Plugin issue for the image size
• Normalizing CSS also catches CSS IDs instead of only URLs
• Twenty Twenty-Two: 404 search label should be translated
• Twenty Twenty-Two: Pricing Table pattern header levels should be consistent
• By applying a background color to a group block, it aligns to the left in the editor
• Custom fields issue
• Media Library Dragging Option Isn’t Reflected
• Dashboard welcome banner: fix bug when displayed in certain contexts
• Twenty Twenty-Two – Update theme URI link
• Widgets editor: Widget Group is missing .wp-widget-group__inner-blocks container
• Twenty Twenty-Two: Restore padding for Group blocks with a background color
• Plugins no longer download to tmp folder
• In block themes, styles should load in the head
• View scripts of blocks are loaded in editor
• Full Site Editing: PHP Warning with incomplete presets
• Normalizing relative CSS links should skip data URIs
• Allow fully extending WP_Theme_JSON and WP_Theme_JSON_Resolver classes
• Backport bugfixes from Gutenberg into Core for WP 5.9.1
• Block styles should load after global styles in the editor
• Global styles duotone not rendering in post editor
• Fix for late static binding in the resolver
• Block Editor: Add settings to enable/disable auto anchor generation
• Load block support styles in the head for block themes
• Fix global styles loading logic
• Site Editor: Limit template part slugs to Latin chars
• Allow extending the WP_Theme_JSON_Gutenberg class
• Edit Site: Add template check to ‘setPage’ action
• Add site editor initial redirect error handling
• Fix search block html handling for label and button text 
• Gallery block: copy all attributes when transforming to Image blocks
• Allow child classes to use the private methods and constants
• Only apply the social links block migration if there’s a need for a migration
• Block preview: fix resize listener
• Duotone: Allow users to specify custom filters
• Remove the aria-label from the site title block
• Images: Try moving responsive rule to common.scss. 
• Cover block: Add back missing styles
• Gallery block: fix bug with link destination default option not being set
• Gallery: Ensure the last image takes up all available space
• Post Editor: Fix template queries
• Tree Grid: Fix keyboard navigation for expand/collapse table rows in Firefox
• Fix duotone render in non-fse themes
• Unset inherited backgrounds on Posts Lists
• Site Editor: Fix broken ‘Redo’ by removing faulty logic for discarding unsaved Logo changes
• Load the global styles before the theme styles in the editor
• Block.json schema: update fontSize and lineHeight props
• [History]: Fix redo after update/publish with transient edits
• Update core/archive block schema to reflect no block-level settings support
• Spacer: Fix unit settings filter
• Schema: Fix appearanceTools in theme.json schema
• Site Editor: Add keyboard shortcut help modal
• Site Editor: Add the “Help” link to the tools menu
• Fix: Coloring panel is unusable in RTL
• Docs: Add automated theme.json reference documentation
• Update: make color style labels simpler
• Show UI warning if Pages cannot be retrieved in Page List block
• Fix empty gray circle when site has no logo on template list page
• Update: Allow color gradient popover to be above the color toggle
• Border panel: Collapse color controls
• Site editor – try redirecting to homepage before the react render 
• Remove versioning in theme schema descriptions
• Update: PanelColorGradientSettings to use dropdowns
• Block Editor: Handle the absence of href attrib in links
• Update theme.json version
• Update theme.json schema to allow for per-block management of settings
• Post Featured Image: Move width and height controls into the Dimensions panel via SlotFill
• Schemas: Allow custom blocks in theme.json styles
• Add pattern to name key in block.json Schema
• Schema: Allow block.json attribute type to be an array
• Fix duotone theme cache
• Spacer: add custom units for height and width
• Focus save button when entities save states panel is opened

Remember to create a backup before updating.