title: Is it possible to disable a GtkNotebook tab (like set_sensitive(*tab*, false)) in GTK+ 2.24?
body: <p>I have searched on the internet but didn't reach any conclusion.<br>
  This feature feels "natural" in the GUI, that's why I'm asking here despite having found nothing on the issue.<br>
  I already know that if I hide the top widget of the notebook page, the tab disappears, but that's not what I'm looking for. What I really wanted was for the tab to not be sensitive, just like <code>gtk_widget_set_sensitive(GTK_WIDGET(notebook_tab), false);</code><br>
  Thank you!</p>