[IMP] web, website: prevent auto scroll from left panel

* Prior to this commit, when starting to drag a new snippet from
  the left panel, the auto scroll feature was triggered if the
  snippet was one of the top or bottom ones.

* After this commit, the auto scroll feature will be disabled from
  the left panel.

task-2307404

closes odoo/odoo#57449

X-original-commit: f1f48cdaab3dd7847e8546ad9887f24a9e2ed4c1
Related: odoo/enterprise#13139
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>

addons/web_editor/static/src/js/editor/snippets.editor.js

@@ -1791,6 +1791,9 @@ var SnippetsMenu = Widget.extend({
                 $top: $('#web_editor-top-edit'), // TODO should ideally be retrieved another way
                 $left: this.$el,
             }, options.offsetElements),
+            scrollBoundaries: Object.assign({
+                left: false,
+            }, options.scrollBoundaries),
             jQueryDraggableOptions: Object.assign({
                 appendTo: this.$body,
                 cursor: 'move',