[Glitch] When search enabled, display hint in search popout

Port 7901f9f63e to glitch-soc

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

@@ -19,6 +19,7 @@ export const boostModal = getMeta('boost_modal');
 export const favouriteModal = getMeta('favourite_modal');
 export const deleteModal = getMeta('delete_modal');
 export const me = getMeta('me');
+export const searchEnabled = getMeta('search_enabled');
 export const maxChars = (initialState && initialState.max_toot_chars) || 500;
 
 export default initialState;