Move `locked_muc_domain` and `muc_domain` to model

src/converse-muc-views.js

@@ -113,10 +113,8 @@ converse.plugins.add('converse-muc-views', {
         _converse.api.settings.update({
             'auto_list_rooms': false,
             'cache_muc_messages': true,
-            'locked_muc_domain': false,
             'locked_muc_nickname': false,
             'muc_disable_slash_commands': false,
-            'muc_domain': undefined,
             'muc_show_join_leave': true,
             'muc_show_join_leave_status': true,
             'roomconfig_whitelist': [],
@@ -125,11 +123,6 @@ converse.plugins.add('converse-muc-views', {
             }
         });
 
-        if (_converse.locked_muc_domain && !_.isString(_converse.muc_domain)) {
-            throw new Error("Config Error: it makes no sense to set locked_muc_domain "+
-                            "to true when muc_domain is not set");
-        }
-
         function ___ (str) {
             /* This is part of a hack to get gettext to scan strings to be
             * translated. Strings we cannot send to the function above because

src/headless/converse-muc.js

@@ -112,17 +112,24 @@ converse.plugins.add('converse-muc', {
         // Refer to docs/source/configuration.rst for explanations of these
         // configuration settings.
         _converse.api.settings.update({
-            allow_muc: true,
-            allow_muc_invitations: true,
-            auto_join_on_invite: false,
-            auto_join_rooms: [],
-            auto_register_muc_nickname: false,
-            muc_history_max_stanzas: undefined,
-            muc_instant_rooms: true,
-            muc_nickname_from_jid: false
+            'allow_muc': true,
+            'allow_muc_invitations': true,
+            'auto_join_on_invite': false,
+            'auto_join_rooms': [],
+            'auto_register_muc_nickname': false,
+            'locked_muc_domain': false,
+            'muc_domain': undefined,
+            'muc_history_max_stanzas': undefined,
+            'muc_instant_rooms': true,
+            'muc_nickname_from_jid': false
         });
         _converse.api.promises.add(['roomsAutoJoined']);
 
+        if (_converse.locked_muc_domain && !_.isString(_converse.muc_domain)) {
+            throw new Error("Config Error: it makes no sense to set locked_muc_domain "+
+                            "to true when muc_domain is not set");
+        }
+
 
         async function openRoom (jid) {
             if (!u.isValidMUCJID(jid)) {