title: How can I choose a tab in a tabpanel without changing the card in ExtJS?
body: <p>I have a tab panel with 3 tabs. The first tab is the general tab and has a tree with 2 types of nodes. When the user selects the first tab I want to show both types of nodes in the tree. When he selects the second or the third tab I want to hide away one type of node respectively. I do this by checking the beforetabchange event and removing nodes from the tree store and adding them back up. However, I do not want to change my 'card' in the tabpanel since all 3 tabs are supposed to show the same stuff. To achieve that, in my handler I return false in order to block the tab change. However this makes it so that the selected tab never changes and this causes problems. Is there a way to change tabs normally but keep one card active?</p>
  
  <p>Thanks</p>