bug 309093 - Next button state isn't updated after going back, r=mano

browser/components/migration/content/migration.js

@@ -242,6 +242,12 @@ var MigrationWizard = {
     }
   },
 
+  onImportItemsPageRewound: function ()
+  {
+    this._wiz.canAdvance = true;
+    this.onImportItemsPageAdvanced();
+  },
+
   onImportItemsPageAdvanced: function ()
   {
     var dataSources = document.getElementById("dataSources");

browser/components/migration/content/migration.xul

@@ -121,7 +121,7 @@
   <wizardpage id="importItems" pageid="importItems" label="&importItems.title;"
               next="migrating"
               onpageshow="return MigrationWizard.onImportItemsPageShow();"
-              onpagerewound="return MigrationWizard.onImportItemsPageAdvanced();"
+              onpagerewound="return MigrationWizard.onImportItemsPageRewound();"
               onpageadvanced="return MigrationWizard.onImportItemsPageAdvanced();"
               oncommand="MigrationWizard.onImportItemCommand();"> 
     <description control="dataSources">&importItems.label;</description>