Bonjour,
I use a treeview, which is displayed correctly if I do not use an HTML template (see image Sceancewithouttemplate)
If I use a template, the treeview is not displayed as it should, (see Sceancewithtemplate image)
I use boostrap, I have attached the HTML files, if you have an idea, I'm interested
Sincerely
Alain Verdier