More on caching axis label text shapes.  Still disabled.

Lots of stuff is still not working....

Change-Id: Ib2548e912da75aa55bd215bf79a845331a6bad5f
Adjust text properties after adding a cached text object...

But it still doesn't work, and I have a feeling that this strategy will
not work without a huge amount of effort.  I'll probably abandon it and
try something else.

Change-Id: Ic09b6e65abdd5595810b29c6ba7858cb5e7b31b5