pressing Ctrl+tab doesn't switch tabs like it does in other tabbed apps; b=136915, r=neil@parkwaycc.co.uk, sr=jag, fix by jruderman@hmc.edu (Jesse Ruderman)

xpfe/global/resources/content/bindings/tabbrowser.xml

@@ -1150,7 +1150,6 @@
         <![CDATA[
         this.mCurrentBrowser = this.mPanelContainer.firstChild;
         this.mCurrentTab = this.mTabContainer.firstChild;
-        this.mTabBox.setAttribute("handleCtrlTab", "false");
         ]]>
       </constructor>