Big batch of UI updates (#276)

* Replace react-native-root-toast with a custom toast that fits the visual style

* Tune dark mode colors

* Tune colors a bit more

* Move the reply prompt to a fixed position in the footer

* Fully hide muted posts but give a control to show anyway (close #270)

* Improve thread rendering (better clarity on reply lines)

* Add follower/following counts to side menu

* Fix issues with display name overflows

web/webpack.config.js

@@ -9,7 +9,6 @@ const uncompiled_deps = [
   '@bam.tech/react-native-image-resizer',
   'react-native-fs',
   'rn-fetch-blob',
-  'react-native-root-toast',
   'react-native-root-siblings',
   'react-native-linear-gradient',
 ]