Lataa Mailspring 1.18.0

Features:
- Grammar check is now available in the composer! (#2612)
- This feature relies on a deployment of LanguageTool at id.getmailspring.com - when you use Grammar Check, small snippets of your draft are sent to this server, but the requests are not logged and no message data is stored.
- This feature is disabled by default. To turn it on, click the new icon in the composer toolbar.
- Mailspring now properly detects "Do Not Disturb" status on MacOS Sequoia and on Windows.
Bug Fixes:
- On Wayland, the --background flag now shows the main window briefly then hides it, which is the best we can do under Wayland's rules. (#2623)
- On Wayland, fixed a keyboard freeze in the composer caused by a double focus() call. (#2622)
- Fixed sound notifications playing on Windows regardless of the notification preference. (#2619)
- Fixed the tray icon theme detection on GNOME/Unity Linux desktops. (#2610)
- Fixed a crash in vCard parsing when the VERSION line is not found.
- Fixed an issue with the first CardDAV sync incorrectly seeing existing ETags in mailsync.
- Fixed IMAP IDLE to process VANISHED notifications sent by FastMail (and possibly other providers).
- Fixed folder priority logic that was incorrectly applied to non-iCloud accounts in mailsync.
Improvements:
- Added support for the stnadard biographies / notes field on contacts. (#2621)
- Rearranged the thread context menu to reduce accidental destructive actions. (#2620)
- Added an empty state to the calendar when no CalDAV accounts are connected. (#2625)
- The draft window now uses the message subject as the window title.
- Improved read receipt tracking pixel reliability. (#2613)
- Improved mail rules robustness and fixed condition evaluation bugs. (#2616)
- Added VTIMEZONE to created calendar events so they are created on Yahoo in the correct timezone.
- Enabled CalDAV discovery to support Fastmail, Yahoo, and other providers in the upcoming calendar.
- On Windows, the app icon is now a rounded square to better fit with Windows 11 design guidelines.
Developer:
- Replaced CSS-based platform hiding with React conditionals in preferences. (#2614)
- Removed subpixel-antialiased font smoothing overrides. (#2618)
- Added syncInit to main-calendar to eliminate a 2.5s startup delay. (#2606)