[IMP] web: core: ModelFieldSelector improved extensibility

Before this commit, when the ModelFieldSelector was updated, it only transmitted its chain as a string
But in some cases we do need the full chain as Object to check on fields that are part of it.

After this commit, this is the case.

Part-of: odoo/odoo#115799

addons/web/static/src/core/model_field_selector/model_field_selector.js

@@ -4,7 +4,7 @@ import { useModelField } from "./model_field_hook";
 import { useUniquePopover } from "./unique_popover_hook";
 import { ModelFieldSelectorPopover } from "./model_field_selector_popover";
 
-import { Component, onWillStart, onWillUpdateProps, useState } from "@odoo/owl";
+import { Component, onWillStart, onWillUpdateProps, toRaw, useState } from "@odoo/owl";
 
 export class ModelFieldSelector extends Component {
     setup() {
@@ -40,13 +40,13 @@ export class ModelFieldSelector extends Component {
         }
         return this.modelField.loadChain(resModel, fieldName);
     }
+
     async update(fieldName, isFieldSelected) {
         this.state.fieldName = fieldName;
         this.state.isDirty = !isFieldSelected;
+        this.state.chain = await this.loadChain(this.props.resModel, fieldName);
         if (isFieldSelected) {
-            await this.props.update(fieldName);
-        } else {
-            this.state.chain = await this.loadChain(this.props.resModel, fieldName);
+            await this.props.update(fieldName, toRaw(this.state.chain));
         }
     }
 
@@ -71,7 +71,7 @@ export class ModelFieldSelector extends Component {
                 popoverClass: "o_popover_field_selector",
                 onClose: () => {
                     if (this.state.isDirty) {
-                        this.props.update(this.state.fieldName);
+                        this.props.update(this.state.fieldName, toRaw(this.state.chain));
                     }
                 },
             }