Tweaks init command and init doc submission.

Tweaks init command and init doc submission.

Makes submitting SP init docs available directly on "pz2x"
(SP extension bean) and puts the init response into the regular
flow of processing for display as any other response.

Makes it optional to reset the init response when resetting
search/record/show data. As before, search data are reset on renewed
search or when the server or authentication changes. Init response
is now only reset on changed init (whether it happens implicit or
explicit).