Amethyst 0.51.2: More Performance Improvements

- Changes the structure of the notification view to increase speed.
- Preserves opening invalidations of data sources for Home, Videos, and Notifications screens
- Activates invalidations that can be ignored if another invalidation is currently running
- Only call "scroll to the top" if not at the top
- Remembers formatting for the Notification reaction row
- Updates Notification feed in intervals of 1 second
- Remembers modifiers to avoid recomposition
- Moves Home and Video screen invalidations to follow the scrollTop par…
- Adds Stable tag to Notification Card models
- Remembers the size of the robohash picture between recompositions
- Removes the procedure to start connecting with relays before logging in.

Download:
- Play Edition with Push Notifications & Translations: https://github.com/vitorpamplona/amethyst/releases/download/v0.51.2/amethyst-googleplay-universal-v0.51.2.apk

- F-Droid Edition without Translations: https://github.com/vitorpamplona/amethyst/releases/download/v0.51.2/amethyst-fdroid-universal-v0.51.2.apk