[FIX] web_editor: properly insert character in empty nested list

Fix a bug that can be reproduced like so:
- Insert list
- Type char
- ENTER
- TAB
- Type char
The character gets inserted _after_ the `br` instead of replacing it.

closes odoo/odoo#34805

Signed-off-by: Pierre Paridans <pparidans@users.noreply.github.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/addons/web_editor/static/src/js/wysiwyg/plugin/helper.js b/addons/web_editor/static/src/js/wysiwyg/plugin/helper.js
index a025d6a0082..1738e6e7b48 100644
--- a/addons/web_editor/static/src/js/wysiwyg/plugin/helper.js
+++ b/addons/web_editor/static/src/js/wysiwyg/plugin/helper.js
@@ -1885,6 +1885,9 @@ var HelperPlugin = AbstractPlugin.extend({
         // Create empty text node to have a range into the node
         if (range.sc.tagName && !dom.isVoid(range.sc) && !range.sc.childNodes[range.so]) {
             $(range.sc).append(invisible);
+            if (invisible.previousSibling && invisible.previousSibling.tagName === "BR") {
+                invisible.previousSibling.remove();
+            }
             range = this.context.invoke('editor.setRange', invisible, 0);
         }