[FIX] hr_expense: expense categories padding issue

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>

addons/hr_expense/static/src/scss/hr_expense.scss

@@ -34,3 +34,7 @@
       height: 100%;
     }
 }
+
+.o_expense_categories td[name="description"] p:last-child {
+    margin-bottom: 0;
+}

addons/hr_expense/views/hr_expense_views.xml

@@ -561,7 +561,7 @@
             <field name="name">product.product.expense.categories.tree.view</field>
             <field name="model">product.product</field>
             <field name="arch" type="xml">
-                <tree>
+                <tree class="o_expense_categories">
                     <field name="name" readonly="1"/>
                     <field name="default_code" optional="show" readonly="1"/>
                     <field name="description" widget="html" string="Internal Note" optional="show" readonly="1"/>