Let the front-end know the current account is a moderator

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

@@ -21,5 +21,6 @@ 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 const isStaff = getMeta('is_staff');
 
 export default initialState;