[Glitch] Add language dropdown to compose in web UI

Port 0cdb077570 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/util/initial_state.js

@@ -38,5 +38,6 @@ export const usePendingItems = getMeta('use_pending_items');
 export const useSystemEmojiFont = getMeta('system_emoji_font');
 export const showTrends = getMeta('trends');
 export const disableSwiping = getMeta('disable_swiping');
+export const languages = initialState && initialState.languages;
 
 export default initialState;