[Glitch] Fix timeline markers not working on Chrome

Port 5aff2a6957 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

app/javascript/flavours/glitch/reducers/index.js

@@ -36,6 +36,7 @@ import polls from './polls';
 import identity_proofs from './identity_proofs';
 import trends from './trends';
 import announcements from './announcements';
+import markers from './markers';
 
 const reducers = {
   announcements,
@@ -75,6 +76,7 @@ const reducers = {
   pinnedAccountsEditor,
   polls,
   trends,
+  markers,
 };
 
 export default combineReducers(reducers);