Add emojis to autocomplete

Improve autocomplete:
 - Add space after autocompleted item
 - Emotes starting with `:` can now be autocompleted properly (i.e. emojis)

src/emotemanager.hpp

@@ -94,6 +94,8 @@ public:
 
     QString replaceShortCodes(const QString &text);
 
+    std::vector<std::string> emojiShortCodes;
+
     /// Twitch emotes
     void refreshTwitchEmotes(const std::string &roomID);