Bug 586198 - Incorrect placement of tab after Undo Close Tab in Tab Candy [r=dolske a=blocking2.0:beta4]

Explicitly wipe out tab storage data on close so that undo close tab acts like a brand new tab.

--HG--
extra : rebase_source : f05ab57dff8a10be9df9e93bb128a4b716336c7a

browser/base/content/tabview/tabitems.js

@@ -856,6 +856,7 @@ window.TabItems = {
       Items.unsquish(null, tab.tabItem);
 
       tab.tabItem = null;
+      Storage.saveTab(tab, null);
 
       let index = this._tabsWaitingForUpdate.indexOf(tab);
       if (index != -1)