[polari] ui: Fix action name in join-menu

[Florian Müllner <fmuellner src gnome org>]

commit 1eae15216143553e5542018e494bd97442d828c1
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Sep 28 22:44:10 2013 +0200

    ui: Fix action name in join-menu
    
    Commit b8cd95265f8a renamed the 'message-user' action to
    'show-message-user-dialog', fix a remaining reference to
    the old name.

 data/resources/main-window.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/resources/main-window.ui b/data/resources/main-window.ui
index 7e77327..cb3df3d 100644
--- a/data/resources/main-window.ui
+++ b/data/resources/main-window.ui
@@ -9,7 +9,7 @@
       </item>
       <item>
         <attribute name="label" translatable="yes">Message a User</attribute>
-        <attribute name="action">app.message-user</attribute>
+        <attribute name="action">app.show-message-user-dialog</attribute>
       </item>
     </section>
   </menu>