Validate field set later

Closes #12739
(grafted from 31958cc6bbae3c46dbaeb919221ceb317f5e2ccc)

--HG--
branch : 7.0

sao/src/model.js

@@ -860,6 +860,7 @@
                 value = later[name];
                 this.model.fields[name].set(this, value);
                 this._loaded[name] = true;
+                fieldnames.push(name);
             }
             if (validate) {
                 this.validate(fieldnames, true, false, false);

tryton/tryton/gui/window/view_form/model/record.py

@@ -498,6 +498,7 @@ class Record:
         for fieldname, value in later.items():
             self.group.fields[fieldname].set(self, value)
             self._loaded.add(fieldname)
+            fieldnames.append(fieldname)
         if validate:
             self.validate(fieldnames, softvalidation=True)
         if modified: