Activate GUI for watermark layout.

It is now possible to layout properly a watermark whose scale is
computed based on the larger or smaller border. This make it possible
to use a watermark inside a style an apply it into images in portrait
and landscape mode with proper layout.
Clean-up multi-instance in created or updated style.

We really want to have the multi_priority starting from 0 and increasing
one by one for every multi-instance module.
Clean-up multi-instance after pasting history from another image.

We really want to have the multi_priority starting from 0 and increasing
one by one for every multi-instance history items just pasted from
another image.
noiseprofiles: fix pentax k10d/k100d (like 22e5142)
Fix compile with saxon/remove warning with xsltproc
If zoom==1, apply metadata only to visible image, if not, to selection. Fixes #8772
profiled denoise: fix Canon 400D model string
Hopefully fix ,. issues in bauhaus entry

This is at least related to #9304. No idea if it fixes it ...
darktableconfig.xml moved to build/data/
darktableconfig.xml isn't needed for translation
noise profile: pentax k-m by jean-christophe caffe
noise profile: initialize profile count even for jpg.
Fix export to filenameWithExtension.newExtension
Merge branches 'style-multi-instance' and 'history-multi-instance'

* style-multi-instance:
  Clean-up multi-instance in created or updated style.

* history-multi-instance:
  Clean-up multi-instance after pasting history from another image.
Compute offset as MAX(num) instead of COUNT(num).

This is needed as an history stack may not have continuous num values. This
can happen after applying a style or a partial copy/paste. Note MAX(num) is
already used in other places like image.c.
Remove dead code, can always be resurected from Git.
Merge branch 'fix-offset-value'

* fix-offset-value:
  Remove dead code, can always be resurected from Git.
  Compute offset as MAX(num) instead of COUNT(num).
usermanual: proofreading of chapter 3 intro thanks to Rob Z. Smith
usermanual: several minor fixes
styles : initialise each module instance #9299