Set readonly Screen of One2Many when parent group is readonly

The user must not be allowed to modify records of a One2Many if the parent
record can not be saved.

Closes #13923

sao/src/screen.js

@@ -1249,6 +1249,7 @@
                 }
             }
             this.group.exclude_field = this.exclude_field;
+            this.group.readonly = this.__readonly;
         },
         new_group: function(context) {
             if (!context) {

sao/src/view/form.js

@@ -3442,6 +3442,7 @@ function eval_pyson(value){
                 order: attributes.order,
                 row_activate: this.activate.bind(this),
                 exclude_field: attributes.relation_field || null,
+                readonly: this.view.screen.group.readonly,
                 limit: null,
                 context: this.view.screen.context,
                 pre_validate: attributes.pre_validate,

tryton/tryton/gui/window/view_form/screen/screen.py

@@ -429,6 +429,7 @@ class Screen:
         for name, views in fields_views.items():
             self.__group.fields[name].views.update(views)
         self.__group.exclude_field = self.exclude_field
+        self.__group.readonly = self.__readonly
 
     group = property(__get_group, __set_group)
 

tryton/tryton/gui/window/view_form/view/form_gtk/one2many.py

@@ -166,6 +166,7 @@ class One2Many(Widget):
             order=attrs.get('order'),
             row_activate=self._on_activate,
             exclude_field=attrs.get('relation_field', None),
+            readonly=self.view.screen.group.readonly,
             limit=None,
             context=self.view.screen.context,
             breadcrumb=breadcrumb)