[FIX] base: make the "New password" column visible in Safari

In a Safari or with GNOME web browser:
- Run a Odoo server without the password policy app
- Go to Settings->User->Select an user
- Click on the action menu and "Change Password"

Current Behaviour
-----------------
The "New password" column have a width of 0.

Expected Behaviour
------------------
The "New password" column is shown.

This commit sets a min width to the new password column to avoid this
weird shenanigan from Safari of setting the width to 0. After some
reverse engineering of understanding why Safari does that I was not able
to find why.

closes odoo/odoo#145930

Task-id: 3573558
X-original-commit: 0dbb0938a90ee0155684bd5bdc7f50f0a9434b9d
Signed-off-by: Luca Vitali (luvi) <luvi@odoo.com>
Signed-off-by: Florent Dardenne (dafl) <dafl@odoo.com>

odoo/addons/base/views/res_users_views.xml

@@ -40,7 +40,7 @@
                 <tree string="Users" editable="bottom" create="false" delete="false">
                     <field name="user_id" invisible="1"/>
                     <field name="user_login" force_save="1"/>
-                    <field name="new_passwd" password="True"/>
+                    <field name="new_passwd" password="True" width="20px"/>
                 </tree>
             </field>
         </record>