Do not compute domain inversion when displaying column that is not a field

Since c320a786923f the field is needed to compute domain inversion so we
should not compute domain inversion for non field.

Closes #12814
(grafted from fe581cde6705c4b2e7bad61894e0b3098ede65f3)

--HG--
branch : 7.0

sao/src/view/tree.js

@@ -878,7 +878,7 @@
                 } else if (name === this.screen.exclude_field) {
                     visible_columns -= 1;
                     column.set_visible(false);
-                } else {
+                } else if (name in this.screen.model.fields) {
                     const field = this.screen.model.fields[name];
                     var inv_domain = inversion.domain_inversion(domain, name);
                     if (typeof inv_domain != 'boolean') {

tryton/tryton/gui/window/view_form/view/list.py

@@ -1131,8 +1131,8 @@ class ViewTree(View):
                 column.set_visible(False)
             elif name == self.screen.exclude_field:
                 column.set_visible(False)
-            else:
-                field = self.group.fields.get(name)
+            elif name in self.group.fields:
+                field = self.group.fields[name]
                 inv_domain = domain_inversion(domain, name)
                 if not isinstance(inv_domain, bool):
                     inv_domain = simplify(inv_domain)