[entities] Move CWSource update_config method as a function in 3.15 migration script
This script is the only caller of this method. In the code of the function,
drop "skip_unknown" argument and continue accordingly upon OptionError.
The View system
===============
This chapter aims to describe the concept of a `view` used all along
the development of a web application and how it has been implemented
in |cubicweb|.
.. toctree::
:maxdepth: 3
views
basetemplates
primary
reledit
baseviews
startup
boxes
table
xmlrss
urlpublish
breadcrumbs
idownloadable
wdoc
.. editforms
.. embedding