title: QTabWidget: close tab button not working
body: <p>I have set <code>ui-&gt;tabWidget-&gt;setTabsClosable(true);</code> but <code>QTabwidget</code> only showing a cross on each tab that is not closing tab on click on this button. What else I have to do to make tabs closable? I tried to connect any slot (which would be proper for this work) of close to signal <code>tabCloseRequested(int)</code> but couldn't find any such slot in tabwidget. Please suggest the right way.</p>