Fix regarding ChatRoomView.getDefaultNickName() and muc_nickname_from_jid (#911)

* ChatRoomView.getDefaultNickName() when muc_nickname_from_jid  is used

Allows to overridde nickname by plugins when muc_nickname_from_jid is used.

* CHANGES.md updated

CHANGES.md

@@ -5,6 +5,7 @@
 ### Bugfixes
 - Various IE11 fixes.
 - Translations written as template literals [aren't parsed properly by xgettext](https://savannah.gnu.org/bugs/?50920).
+- Fix regarding ChatRoomView.getDefaultNickName() and muc_nickname_from_jid
 
 ## 3.2.0 (2017-08-09)
 

src/converse-muc.js

@@ -1571,7 +1571,7 @@
                     if (_converse.muc_nickname_from_jid) {
                         // We try to enter the room with the node part of
                         // the user's JID.
-                        this.join(Strophe.unescapeNode(Strophe.getNodeFromJid(_converse.bare_jid)));
+                        this.join(this.getDefaultNickName());
                     } else {
                         this.renderNicknameForm(message);
                     }