Show suggested follows on search screen in mobile layout (#9010)

Reminder: Suggestions were added in #7918 and are based on who you
interact with who you do not follow. E.g. if you boost someone a lot
from seeing other people's boosts of that person, it makes sense you
might be interested in following the original source; or if you reply
to someone a lot, maybe you'd want to follow them

Each suggestion can be dismissed

app/javascript/mastodon/reducers/index.js

@@ -28,6 +28,7 @@ import lists from './lists';
 import listEditor from './list_editor';
 import filters from './filters';
 import conversations from './conversations';
+import suggestions from './suggestions';
 
 const reducers = {
   dropdown_menu,
@@ -59,6 +60,7 @@ const reducers = {
   listEditor,
   filters,
   conversations,
+  suggestions,
 };
 
 export default combineReducers(reducers);