Download Mailspring 1.22.0

Features:
- Added the ability to choose which themes apply in automatic light/dark mode. (#2732) Thanks @Jayphen!
Bug Fixes:
- Fixed null crash when clicking "Send now" on undo-send toast after the message had already been sent. (#2738)
- Fixed two null-access crashes reported in Sentry (MAILSPRING-CLIENT-1G, MAILSPRING-CLIENT-18, MAILSPRING-CLIENT-2V). (#2740)
- Fixed two Sentry crashes: null account in preferences and null window in app menu IPC. (#2741)
- Fixed crash when archiving from search with label-based archive categories. (#2743)
- Fixed null crash when removing threads with unsynced trash/archive category. (#2736)
- Fixed Outlook account setup. (#2735) Thanks @Suchiman!
- Fixed Windows print crash caused by invalid file URL. (#2733)
- Fixed TOCTOU null-reference crash in draft body setter (MAILSPRING-CLIENT-S). (#2728)
- Fixed DefaultClientHelperMac passing boolean to error callback, causing false Sentry reports. (#2731)
- Fixed AttributeDateTime.fromJSON treating 0/falsy values as missing. (#2730)
- Fixed quickpreview CSP clobbering the default session's app-wide CSP. (#2744) Thanks @dansleboby!
- Fixed QuerySubscription._fetchRange contiguity check using actual result length. (#2734)
- On Windows, fixed EPERM crash when forking background query agent. (#2745)
Improvements:
- Improved Microsoft OAuth: better email resolution and suppressed no-mailbox errors from Sentry. (#2746)
- Added diagnostics around "draft not found" error on send and cleaned up waiting queues. (#2727)
- Moved payment flow out of modal to launch on the web for newer Stripe integration.
- Richer exceptions when account has no from address or when label is provided to ChangeFolderTask.
- Draft reminders now use thread: metadata prefix so sync engine promotes them to thread on send. (#2729)
- Sync engine now forwards identity-level refresh events from delta stream. (mailsync#115)