Emoji reactions

Requires develop backend that supports latest emoji reaction format.

This MR does:

• add new reactions with unicode emoji
• use search to filter through the emoji or pick one of the "common" ones
• click on existing reactions to add your own or remove it

This MR doesn't:

• have notifications for reactions
• update emoji reactions in real time

This MR should still:

• limit the amount of reactions shown per status

src/services/api/api.service.js

@@ -894,7 +894,7 @@ const reactWithEmoji = ({ id, emoji, credentials }) => {
     method: 'POST',
     credentials,
     payload: { emoji }
-  }).then(status => parseStatus(status))
+  }).then(parseStatus)
 }
 
 const unreactWithEmoji = ({ id, emoji, credentials }) => {