Fix caret position after inserting emoji (#7167)

app/javascript/mastodon/actions/compose.js

@@ -446,11 +446,12 @@ export function changeComposeVisibility(value) {
   };
 };
 
-export function insertEmojiCompose(position, emoji) {
+export function insertEmojiCompose(position, emoji, needsSpace) {
   return {
     type: COMPOSE_EMOJI_INSERT,
     position,
     emoji,
+    needsSpace,
   };
 };