alpha-273

• [*] Adds tablet mode in site and post/page previews [https://github.com//pull/13787]
• [*] Reader: show post menu for posts in Blog Preview and Search results [https://github.com//pull/13897]
• [**] Site Creation: Enables dot blog subdomains for each site design. [https://github.com//pull/13917]
• [***] Block Editor: New Block: Audio [https://github.com/wordpress-mobile/gutenberg-mobile/pull/2854, https://github.com/wordpress-mobile/gutenberg-mobile/pull/3070]
• [**] Block Editor: Add support for setting heading anchors [https://github.com/wordpress-mobile/gutenberg-mobile/pull/2947]
• [**] Block Editor: Disable Unsupported Block Editor for Reusable blocks [https://github.com/wordpress-mobile/gutenberg-mobile/pull/3067]
• [**] Block Editor: Add proper handling for single use blocks such as the more block [https://github.com/wordpress-mobile/gutenberg-mobile/pull/3042]
• [***] Jetpack: Jetpack site owners, you can now run scans, fix threats, restore your site and download backup files directly from within the app. [https://github.com//issues/13267]
• [**] Reader: introduced an Unread Post counter in the Site Filter bottom sheet [https://github.com//pull/13625]
• [**] Reader: added functionality for marking reader posts as Seen or Unseen [https://github.com//pull/13901]