[FIX] website: set URL when picking from drop-down menu

Steps:
- In website, click on a link to edit it
- Type "/" in the LinkTools URL input field
- Pick a URL among the suggested ones

The chosen URL was supposed to be applied to the link, but it is not.
The same applies for the LinkDialog (create a link with the "/link"
command).

Reason:
It might be a little confusing, but the `_onURLInput` method actually
means "update UI according to the URL" (more specifically, display/hide
the "Open In New Window" and "Autoconvert To Relative Link" buttons).
The `__onURLInput` (two underscores) method, on the other hand, is the
actual handler for input events in the URL field. In this case, picking
a URL from a drop-down menu needs the same treatment as inputting text,
that is, the `state.url` property must be set to the new value.

task-3552700

closes odoo/odoo#140061

Signed-off-by: Antoine Guenet (age) <age@odoo.com>

addons/website/static/src/js/editor/editor.js

@@ -18,6 +18,7 @@ patch(LinkDialog.prototype, {
     async start() {
         const options = {
             body: this.$link && this.$link[0].ownerDocument.body,
+            urlChosen: () => this.__onURLInput(),
         };
         const result = await super.start(...arguments);
         wUtils.autocompleteWithPages(this.rpc.bind(this), this.$el.find('input[name="url"]'), options);

addons/website/static/src/js/editor/widget_link.js

@@ -94,7 +94,7 @@ patch(LinkTools.prototype, {
      * @private
      */
     _onAutocompleteClose() {
-        this._onURLInput();
+        this.__onURLInput();
     },
     /**
      * @override

addons/website/static/tests/tours/link_tools.js

@@ -289,10 +289,25 @@ wTourUtils.registerWebsitePreviewTour('link_tools', {
                 throw new Error("Tour step failed");
             }
         }
+    },
+     // 10.Pick a URL with auto-complete
+    {
+        content: "Enter partial URL",
+        trigger: "#o_link_dialog_url_input",
+        run: 'text /contact'
+    },
+    {
+        content: "Pick '/contactus",
+        trigger: "ul.ui-autocomplete li div:contains('/contactus (Contact Us)')",
+    },
+    {
+        content: "Check that links's href and label were updated",
+        trigger: "iframe .s_text_image p a[href='/contactus']:contains('/contactus')",
+        run: () => null,
     },
     ...wTourUtils.clickOnSave(),
     ...wTourUtils.clickOnEditAndWaitEditMode(),
-    // 10. Add mega menu with Cards template and edit URL on text-selected card.
+    // 11. Add mega menu with Cards template and edit URL on text-selected card.
     wTourUtils.clickOnElement("menu link", "iframe header .nav-item a"),
     wTourUtils.clickOnElement("'Edit menu' icon", "iframe .o_edit_menu_popover .fa-sitemap"),
     {