Execute client action also for wizard run from menu

issue3964
review7341002
Refactorize XML parsing

issue3938
review11281004

--HG--
rename : tryton/gui/window/view_form/view/form_gtk/parser.py => tryton/gui/window/view_form/view/form_gtk/state_widget.py
rename : tryton/gui/window/view_form/view/form_gtk/interface.py => tryton/gui/window/view_form/view/form_gtk/widget.py
rename : tryton/gui/window/view_form/view/list_gtk/parser.py => tryton/gui/window/view_form/view/list_gtk/widget.py
Fetch dictionary keys by batch

issue3357
review7331002