[IMP] web_form_banner: list view optional

Author: yostashiro

web_form_banner/views/web_form_banner_rule_views.xml

@@ -8,16 +8,21 @@
                 <field name="sequence" widget="handle" />
                 <field name="name" />
                 <field name="model_id" />
-                <field name="trigger_field_ids" widget="many2many_tags" />
-                <field name="view_ids" widget="many2many_tags" />
-                <field name="severity" />
-                <field name="target_xpath" />
-                <field name="position" />
-                <field name="message" />
-                <field name="message_is_html" />
+                <field
+                    name="trigger_field_ids"
+                    widget="many2many_tags"
+                    optional="show"
+                />
+                <field name="view_ids" widget="many2many_tags" optional="show" />
+                <field name="severity" optional="show" />
+                <field name="target_xpath" optional="show" />
+                <field name="position" optional="show" />
+                <field name="message" optional="show" />
+                <field name="message_is_html" optional="show" />
                 <field
                     name="message_value_code"
                     placeholder="return {'visible': True, 'values': {'title': '...'}}"
+                    optional="show"
                 />
             </tree>
         </field>