Reveal after goto

Occasionally when jumping to the last task we end up inside
a folded region.  This just reveals the headline to make
editing easier.

lisp/org-clock.el

@@ -1305,6 +1305,7 @@ With prefix arg SELECT, offer recently clocked tasks for selection."
     (org-back-to-heading t)
     (org-cycle-hide-drawers 'children)
     (recenter)
+    (org-reveal)
     (if recent
 	(message "No running clock, this is the most recently clocked task"))
     (run-hooks 'org-clock-goto-hook)))