Update release changelog

CHANGELOG-release.md

@@ -1,3 +1,57 @@
+## 2023.5
+This update adds new several Compose-related features, including the ability to edit posts, a share sheet extension, and a post language picker. See below for the full list of improvements and bugfixes.
+
+Features/Improvements:
+- Edit posts
+- Indicate edited posts in timestamp
+- Show post edit history from Conversation screen
+- Add Share Sheet extension
+- Add expanded attachment view on Compose screen
+    - Add an attachment, select the description text field, then tap the expand button
+    - Expanded view allows you to see the attachment while writing the description
+    - Allows playing back videos while writing description
+    - iOS 16: Allows zooming in to the attachment
+- Add language picker to the Compose screen
+- Improve Compose screen ducking behavior
+- Show reblogger's avatar on reblogged posts
+- Use system photo picker instead of custom interface
+- Improve hashtag search UI in Customize Timelines
+- Improve status collapse/expand animation on Notifications screen
+- Apply filters to Notifications screen
+- Improve performance when scrolling through timeline
+- Improve error messages when editing filters
+- Change favorite/reblog button order to match Mastodon UI
+- Gracefully handle unknown attachment types
+- iPadOS: Persist sidebar visibility across
+
+Bugfixes:
+- Fix scroll-to-top not working in in-app Safari
+- Fix inaccruate titles in certain error popups
+- Fix error decoding post HTML
+- Fix replied-to account not being the first @-mention
+- Fix "No Content" message on profiles using wrong background color
+- Fix reblogged posts appearing in Bookmarks
+- Fix spurious errors when loading timeline
+- Fix crash when displaying certain profiles
+- Fix crash when the server returns invalid notifications
+- Fix link previews not appearing in Notifications
+- Fix Notifications screen taking a long time to load
+- Fix deleted posts not being removed from Notifications screen
+- Fix crashes when switching between sidebar/tab-bar modes
+- Fix instance features not being detected on IDNA domains
+- Fix list/hashtag timelines missing controls when opened in new window
+- Fix reblog button being enabled on the user's own direct posts
+- Fix main post in Conversation flickering
+- Fix link card images not loading on Mastodon
+- Fix crash when editing filter with the Hide action
+- Fix certain remote status links not being resolved
+- Fix Handoff to iPad/Mac presenting new screen modally
+- GoToSocial: Fix decoding certain posts
+- Calckey: Fix decoding certain posts
+- iPadOS: Fix Compose window lacking a title
+- iPadOS: Fix keyboard focus highlight not showing
+- macOS: Fix sidebar keyboard shortcuts not working
+
 ## 2023.4
 Features/Improvements:
 - Add preference for non-pure-black dark mode