Forgot current tutorial dialog when hiding (so we don't resurrect the final one accidentally)

Author: jonoomph

src/windows/views/tutorial.py

@@ -283,6 +283,9 @@ def hide_tips(self, tid, user_clicked=False):
             self.tutorial_enabled = False
             s.set("tutorial_enabled", False)
 
+        # Forgot current tutorial
+        self.current_dialog = None
+
     def close_dialogs(self):
         """ Close any open tutorial dialogs """
         if self.current_dialog: