Don't close all chatboxes when reconnecting

src/converse-chatboxes.js

@@ -37,9 +37,11 @@
                 return this.__super__.logOut.apply(this, arguments);
             },
 
-            initStatus: function () {
+            initStatus: function (reconnecting) {
                 const { _converse } = this.__super__;
-                _converse.chatboxviews.closeAllChatBoxes();
+                if (!reconnecting) {
+                    _converse.chatboxviews.closeAllChatBoxes();
+                }
                 return this.__super__.initStatus.apply(this, arguments);
             }
         },