[IMP] datetime search field: use date widget, make field's default domain span the whole day (using range)
[IMP] datetime search field: use date widget, make field's default domain span the whole day (using range)

search API improvement: Field gains a make_domain method, called by get_domain to build the default domain for the field.

make_domain is called with the field's name, operator and current values (fully computed), the default implementation is to just shove them all into a domain.

This lets fields customize the default domain for the field without having to reimplement (or breaking) the filter_domain handling
vnc-biz/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,vnc-biz/openerp-web,splbio/openerp-web,gisce/openerp-web,splbio/openerp-web,gisce/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,vnc-biz/openerp-web