[IMP] website: change CTA based on website main objective

If user selects 'schedule appointments' as main objective in the configurator
and if the website_calendar module is installed then the Call To Action of
snippets s_banner, s_cover and s_call_to_action is changed to 'Schedule an
appointment' and redirect user to '/calendar' on click.

task-2518565

closes odoo/design-themes#5

Related: odoo/odoo#71162
Related: odoo/enterprise#18690
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>

theme_vehicle/views/customizations.xml

@@ -10,7 +10,7 @@
         <font style="font-size: 62px;font-weight: bold;">Start the Engine</font>
     </xpath>
     <xpath expr="//a[hasclass('btn')]" position="replace">
-        <a href="/contactus" class="btn btn-primary btn-lg mb-2">START THE ENGINE</a>
+        <a t-att-href="cta_btn_href" class="btn btn-primary btn-lg mb-2"><t t-esc="cta_btn_text.upper()">START THE ENGINE</t></a>
     </xpath>
 </template>