[FIX] base_setup: load demo data does not works

While moving web_settings_dashboard to base_setup in
commit: https://github.com/odoo/odoo/commit/78565b1dc933692abba46a73f2298b7ea8e03c88#diff-2ac1c5a222c5332be62450c099440fd6L292
the load demo data click event was missing.

so added event to load the demo data in base_setup.

Task-2062477

closes odoo/odoo#36275

Closes: #36275
Signed-off-by: Romain Libert (rli) <rli@odoo.com>

addons/base_setup/static/src/js/res_config_dev_tool.js

@@ -7,6 +7,9 @@ odoo.define('base_setup.ResConfigDevTool', function (require) {
 
     var ResConfigDevTool = Widget.extend({
         template: 'res_config_dev_tool',
+        events: {
+            'click .o_web_settings_force_demo': '_onClickForceDemo',
+        },
 
         init: function () {
             this._super.apply(this, arguments);
@@ -25,6 +28,21 @@ odoo.define('base_setup.ResConfigDevTool', function (require) {
                 });
             });
         },
+
+        //--------------------------------------------------------------------------
+        // Handlers
+        //--------------------------------------------------------------------------
+
+        /**
+         * Forces demo data to be installed in a database without demo data installed.
+         *
+         * @private
+         * @param {MouseEvent} ev
+         */
+        _onClickForceDemo: function (ev) {
+            ev.preventDefault();
+            this.do_action('base.demo_force_install_action');
+        },
     });
 
     widget_registry.add('res_config_dev_tool', ResConfigDevTool);