Before: in Expense Categories list view, if Internal Notes wasn't empty it would  cause a padding issue. The issue's cause was that the Internal Notes columns is an HTML field, where every line is assigned a margin-bottom.

Now: fixed the padding issue by removing the margin-bottom for the last line in the Internal Notes field.

task-32999162

closes odoo/odoo#120626

Signed-off-by: William André (wan) <wan@odoo.com>