Don't set default value for user language

issue4400
review12791002

--HG--
extra : rebase_source : a84e3a9a2452c6c426247c8e3d9e3a1548644ac9
Use getboolean for database list configuration

Otherwise the false value is still evaluated to true.

issue4404
review14781002
Remove Pool.object_name_list

This method is inefficient for testing existence of an item, it is better to
ask for forgiveness.

review12761002
Add wizard and state_name to StateView.get_view

This gives the same signature as for get_buttons and get_defaults. And so it
allows to customize the returned view base on the wizard state.

issue4406
review5861002
Fix documentation of ModelView.fields_view_get

review8811002
Use data's action_id to find report to use

issue4411
review10741002
Merge branch 'develop' into extended_sequence

Conflicts:
	CHANGELOG
	trytond/version.py