Before this commit, when `a` tag is in a td, the color of text ellipsis
(3 dots) is different than the text because the text-ellipsis is set on
the parent element, that is `td` element and the color is set on the `a`.

This commit sets the right color on td element when that element has `a`
element.

Limitation (only for td inside element with `o_portal_my_doc_table` class):
if the `td` element contains `a` tag and another element
then the color has to be set to that other html element otherwise,
the color will be the one of the a tag.

task-3251721

closes odoo/odoo#124447

Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>