[Glitch] Add ability to filter followed accounts' posts by language

Port 50948b46aa to glitch-soc

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

app/javascript/flavours/glitch/features/account_timeline/containers/header_container.js

@@ -130,12 +130,18 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     dispatch(unblockDomain(domain));
   },
 
-  onAddToList(account){
+  onAddToList (account) {
     dispatch(openModal('LIST_ADDER', {
       accountId: account.get('id'),
     }));
   },
 
+  onChangeLanguages (account) {
+    dispatch(openModal('SUBSCRIBED_LANGUAGES', {
+      accountId: account.get('id'),
+    }));
+  },
+
 });
 
 export default injectIntl(connect(makeMapStateToProps, mapDispatchToProps)(Header));