frame configuration, frame parameters - how about frame stacking order too?

frame configuration, frame parameters - how about frame stacking order too?

[Drew Adams]

A frame configuration saves the frame parameters of a set of frames. This
information records, for each frame, whether it is visible, invisible, or
iconified.

But it does not record the frame stacking order: which frames are in front of
which other frames. This is an important part of a user's idea of what a frame
configuration should be: Restoring a frame config should restore the set of
frames as they were when the config was saved, including their positions front
to back.

Feature request: Add this information to frame configs. Perhaps we could add to
each frame, as a frame parameter, its current stacking order. Then we could
perhaps make `set-frame-configuration' restore this saved order.

I'm assuming this info can be obtained somehow from the window manager. (I'm no
expert on this.)

(I wonder too if we couldn't have a command to raise or lower a frame just one
notch at at time in the stacking order. Currently, we can only raise it to the
front or lower it to the back.)