Amethyst 0.27.2: Custom hashtags

- Makes hashtags case insensitive by @nostrich
- Adds special #Bitcoin hashtag icon by @nostrich
- Adds special #Nostr hashtag Icon by @nostrich
- Improves Hungarian Translations by @ZsZolee
- Improves NIP-19 parsing by @nostrich
- Disables online search after leaving the Search screen by @nostrich
- Fixes Background color of the badge's description @nostrich
- Fixes some missing messages on chat by @nostrich

Downloads:
- With translations (Google Play): https://github.com/vitorpamplona/amethyst/releases/download/v0.27.2/amethyst-fdroid-universal-v0.27.2.apk

- Without translations (F-Droid): https://github.com/vitorpamplona/amethyst/releases/download/v0.27.2/amethyst-googleplay-universal-v0.27.2.apk