The opportunity form now uses a clearer icon for the quotations button. This helps users understand that the button shows the number of related quotations, not a money amount.

Description of the issue/feature this PR addresses:
Change Quote icon on opportunity stat button

<b>Pad:</b> https://pad.odoo.com/p/r.235c626de2c4da6a627d5f56cf6c7089
<b>Task:</b> https://www.odoo.com/web#id=23081&view_type=form&model=project.task&action=327&menu_id=4720
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The web module documentation now clarifies that actions can be triggered using their XML identifier as well as existing supported references. This helps implementers avoid confusion when configuring or extending workflows, with no expected change for everyday users.

This PR is very IMPORTANT!

This update clarifies that actions can be launched using their XML identifier, making the behavior easier for implementers to understand. It is a documentation-focused change with no expected impact on day-to-day users or business workflows.

This PR is very IMPORTANT!

Its community sibling is: https://github.com/odoo/odoo/pull/10902