fix switching tabs with shortcuts

ext/src/tab/Panel.js

@@ -573,6 +573,9 @@ Ext.define('Ext.tab.Panel', {
             else {
                 Ext.resumeLayouts(true);
             }
+						var currentTab = me.getActiveTab();
+						var content = currentTab.body.dom.querySelector('webview');
+						if (content) content.focus();
             return card;
         }
         return previous;