Poll WIP (#231):

* various fix and improvements

server/lib/prosody/config.ts

@@ -366,6 +366,8 @@ async function getProsodyConfig (options: RegisterServerOptionsV5): Promise<Pros
     }
   }
 
+  config.usePoll()
+
   config.useTestModule(apikey, testApiUrl)
 
   const debugMucAdminJids = debugMucAdmins(options)

server/lib/prosody/config/content.ts

@@ -248,8 +248,6 @@ class ProsodyConfigContent {
     if (chatTerms) {
       this.muc.set('muc_terms_global', new ConfigEntryValueMultiLineString(chatTerms))
     }
-
-    this.muc.add('modules_enabled', 'muc_poll')
   }
 
   useAnonymous (autoBanIP: boolean): void {
@@ -532,6 +530,14 @@ class ProsodyConfigContent {
     }
   }
 
+  /**
+   * Enable the poll feature.
+   */
+  usePoll (): void {
+    this.muc.add('modules_enabled', 'muc_poll')
+    this.muc.set('poll_groupchat_votes_priority', 1000)
+  }
+
   addMucAdmins (jids: string[]): void {
     for (const jid of jids) {
       this.muc.add('admins', jid)