Add a way to control style handling in the export module.

It is now possible to select whether the style module are to be
appended to the current picture history or as before just replacing
the corresponding module in the history.
Add final acknowledgments in the NX1 code
wb_presets: Canon EOS 7D Mark II. Fixes #10236

Data by Alexander Steffen
dt_dev_pixelpipe_process_rec(): avoid integer overflow on big images
Initially reported by frogs (@IRC). Thanks!

Fixes a crash on 135MP+ images when zooming in (100%) on bottom right corner of image.

TODO: find a way to automatically check ALL the similar code and make sure that all of it handles this situation correctly.
Add support for Canon 7DMkII sRaw/mRaw modes
Spots IOP: legacy_params(): adapt for latest mask changes

Shame on me, this should have landed before 1.6,
it was lying in load-raw-raw-data branch (PR #619) since at least Aug 5,
but i totally forgot about this particular commit...

Consequences:
for an image with spot v1, opened from mid summer until now:
	upgrade to v2 = results in broken mask
Now:
	upgrade to v2 = ok...
Merge branch 'export-style-dup-module'

* export-style-dup-module:
  Add a way to control style handling in the export module.
Merge remote-tracking branch 'upstream/master'
Updated Catalan translation