Avoid saving full MUC JID as domain

dist/converse.js

@@ -68202,14 +68202,12 @@ var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_
         showRooms(ev) {
           ev.preventDefault();
           const data = new FormData(ev.target);
-          this.model.save('muc_domain', data.get('server'));
+          this.model.save('muc_domain', Strophe.getDomainFromJid(data.get('server')));
           this.updateRoomsList();
         },
 
         setDomain(ev) {
-          this.model.save({
-            'muc_domain': ev.target.value
-          });
+          this.model.save('muc_domain', Strophe.getDomainFromJid(ev.target.value));
         },
 
         setNick(ev) {
@@ -69805,9 +69803,7 @@ var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_
 
       function setMUCDomain(domain, controlboxview) {
         _converse.muc_domain = domain;
-        controlboxview.roomspanel.model.save({
-          'muc_domain': domain
-        });
+        controlboxview.roomspanel.model.save('muc_domain', Strophe.getDomainFromJid(domain));
       }
 
       function setMUCDomainFromDisco(controlboxview) {

src/converse-muc-views.js

@@ -412,12 +412,12 @@
                 showRooms (ev) {
                     ev.preventDefault();
                     const data = new FormData(ev.target);
-                    this.model.save('muc_domain', data.get('server'));
+                    this.model.save('muc_domain', Strophe.getDomainFromJid(data.get('server')));
                     this.updateRoomsList();
                 },
 
                 setDomain (ev) {
-                    this.model.save({'muc_domain': ev.target.value});
+                    this.model.save('muc_domain', Strophe.getDomainFromJid(ev.target.value));
                 },
 
                 setNick (ev) {
@@ -1929,7 +1929,7 @@
 
             function setMUCDomain (domain, controlboxview) {
                 _converse.muc_domain = domain;
-                controlboxview.roomspanel.model.save({'muc_domain': domain});
+                controlboxview.roomspanel.model.save('muc_domain', Strophe.getDomainFromJid(domain));
             }
 
             function setMUCDomainFromDisco (controlboxview) {