Un-qimport'ing? (i.e. hg qdel tip)

[Hans Meine]

Hi,

I often use "hg qnew -f foo" to quickly stash away all changes, then perform a 
quick fix, and then want to continue working on my previous stuff.  Often, I 
do qpush, but then want to let changes appear as modifications again (e.g. in 
order to use the great crecord command), is there a way to do so?

Right now, I can do
  hg qpop
  cd $HG_ROOT
  patch -p1 < .hg/patches/foo
  cd -
  hg qdel foo

But I wonder if there's a better way.  I could imagine "hg qdel tip", i.e. pop 
& delete an applied patch if it's the tip, but leaving the working directory 
alone (as qdel always does).