Before this commit there were few cases in which
is_html_empty method was not working as our expectation.
In cases such as "<p class=""><br/></p>", "<p id=""><br/></p>"
and many other cases.
In this commit we improves regex of is_html_empty method.
Mow from this commit all kind of attributes will be consider
in this method.
In this commit we also have added is_html_empty in mail template, portal
values and in report values also for rendering templates.
Task id: 2499504
X-original-commit: fd0a05f2955b9f7e9ae7233afebfd6240c9244dd
dht-odoo
57261b100f