This release introduces drag and drop capabilities for sorting blocks, various refinements to the block visual interface (including a label with block type identifier) and extensibility APIs, plus a lot of bug fixes. Thanks to everyone who contributed for all the ongoing efforts!

2.6 🐉 💧

• Add drag and drop functionality to reorder blocks (in addition to arrow movers).
• Improve side UI around nested groups and introduce a block name label on hover.
• Focus the block inspector automatically when a block is selected.
• Allow extending auto-completers via filters — this also exposes the "user" auto-complete to all RichText component instances, making it much easier to leverage for external blocks.
• Use debounced search request in user auto-complete mechanism improving the experience of mentioning in sites with more than 100 users.

Other changes

• Use custom serializer for texturize compatibility. This removes dependency on react-dom/server and integrates better with wptexturize expectations.
• Group advanced block settings (class name and anchor) in a panel.
• Move Post Types Data Fetching to the core-data module.
• Refactor DocumentOutline to use the data module.
• Improve performance of drag and drop by avoiding excessive re-rendering.
• Various UI improvements to controls and components in Block Inspector.
• Remove react-redux usage from the edit-post module, replacing it with the data module. Also improves performance on some block operations.
• Add role=menuitem to the More Options menu items.
• Renamed "Frequent" to "Suggested" in block inserter tab.
• Invert speak messages in block inspector button.
• Include only known terms in rendered Terms selector, fixing issue with occasional empty tags.
• Apply centering style to the theme style output.
• Avoid term request if term set is empty array.
• Provide createHigherOrderComponent helper to Element abstraction.
• Reset block selection when replacing with empty set.
• Prevent unnecessary state updates to edit-post preferences.
• Update Sidebar and Menu Item implementations to use React 16.3 context API.
• Generalise and comment on DOMRect calculation and storage.
• Reopen sidebar when going to viewport sizes larger than medium.
• Widen dropzone indicator to match block width.
• Reset margin and padding values for gallery.
• More defensive checks when accessing capabilities and terms.
• Fix autosave condition while editing a post using the Text Mode editor.
• Fix block movers aria-label info on multi-select groups.
• Fix centered multiline labels in the block settings menu.
• Fix issue with Publish button caused by moment timezone configuration.
• Fix arrow movement inside search input in Inserter.
• Fix broken translation in FormTokenField placeholder.
• Fix issue with invalid string value passed to caption in Image block.
• Fix findDOMNode lint warning.
• Fix error when DOCKER is not defined.
• Fix Safari flashing a white screen just before the editor is loaded.
• Fix problem with meta-boxes toggling.
• Fix WordCounter error when loading meta boxes.
• Fix clone function to allow cloning nested blocks.
• Fix issue with meta-boxes and file inputs.
• Fix issue with block more button when multi selected.
• Handle post ID and WP_Post objects passed to gutenberg_can_edit_post().
• Clear attribute and reset text back to default when cleared in the "More" block.
• Remove an invalid test case from isCurrentPostScheduled.
• Remove code transform for uppercase text in Tooltip component.
• Remove unused PrismJS dependency.
• Remove redundant z-index in block mover.
• Remove background color from paragraph and fixed contrast checker on transparent colors.
• Make block preview title translatable.
• Make the click-redirector responsive (handles clicking on the bottom area of the editor to focus on last field).
• Replace cases of bold font weight with weight 600.
• Various Sass code improvements.
• Add E2E test for splitting/merging paragraph blocks with Enter/Backspace.
• Add test to check CPT templates initialization in E2E tests.
• Add helpers to install/activate/deactivate and remove plugins in E2E tests.
• Re-incorporate Webpack devtool into development build for improved debugging.
• Add $HOME/.npm to Travis cache after addition of Puppeteer library.
• Improve MediaUpload docs.
• Rework all the extensibility related docs to add structure and clarity.
• Remove deprecations slated for 2.6.
• Upgrade React to version 16.3.0.
• Migrate to Webpack 4.

#core-editor, #editor, #gutenberg