Amethyst 0.51.3: Quick bugfixes

- Only refreshes stats for the Reaction Row if the data actually changed.
- Improves rendering of messages in the Notification feed
- BugFix: Feed invalidation is necessary for lists
- Simplifies Private message rendering scheme
- Updates jsoup and activity-compose to the latest versions

Download:
- Play Edition with Push Notifications & Translations: https://github.com/vitorpamplona/amethyst/releases/download/v0.51.3/amethyst-googleplay-universal-v0.51.3.apk

- F-Droid Edition without Translations: https://github.com/vitorpamplona/amethyst/releases/download/v0.51.3/amethyst-fdroid-universal-v0.51.3.apk