[FIX] website: reload connectors on step column duplication/deletion

This commit allows to regenerate the connectors of the step block when
one of the columns of the block is duplicated or deleted.

Steps to reproduce the fixed bug:
- Drop a steps block
- Duplicate one of the columns

=> The last column of the first row has a connector to the right of the
page.

closes odoo/odoo#102797

X-original-commit: 56522f4a26c95878bb726f54eb02c8c948576875
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/website/static/src/snippets/s_process_steps/options.js

@@ -4,6 +4,20 @@ import options from 'web_editor.snippets.options';
 import weUtils from 'web_editor.utils';
 
 options.registry.StepsConnector = options.Class.extend({
+    /**
+     * @override
+     */
+    start() {
+        this.$target.on('content_changed.StepsConnector', () => this._reloadConnectors());
+        return this._super(...arguments);
+    },
+    /**
+     * @override
+     */
+    destroy() {
+        this._super(...arguments);
+        this.$target.off('.StepsConnector');
+    },
 
     //--------------------------------------------------------------------------
     // Options