[IMP] theme_nano: adapt s_banner

Since the redesign of the original banner snippet, the customizations
made in theme_nano have had to be adapted.

task-3097005

Part-of: odoo/design-themes#687

theme_nano/views/images_library.xml

@@ -168,6 +168,16 @@
     <field name="name">website.s_banner_default_image</field>
     <field name="url">/theme_nano/static/src/img/snippets/s_banner.jpg</field>
 </record>
+<record id="s_banner_default_image_2" model="theme.ir.attachment">
+    <field name="key">website.s_banner_default_image_2</field>
+    <field name="name">website.s_banner_default_image_2</field>
+    <field name="url">/theme_nano/static/src/img/snippets/s_banner_2.jpg</field>
+</record>
+<record id="s_banner_default_image_3" model="theme.ir.attachment">
+    <field name="key">website.s_banner_default_image_3</field>
+    <field name="name">website.s_banner_default_image_3</field>
+    <field name="url">/theme_nano/static/src/img/snippets/s_banner_3.jpg</field>
+</record>
 
 <!-- Cover -->
 <record id="s_cover_default_image" model="theme.ir.attachment">

theme_nano/views/snippets/s_banner.xml

@@ -4,19 +4,7 @@
 <template id="s_banner" inherit_id="website.s_banner">
     <!-- Section -->
     <xpath expr="//section" position="attributes">
-        <attribute name="class" add="pt256 o_cc o_cc5" remove="pt96 pb96" separator=" "/>
-        <attribute name="style" add="background-position: 50% 100%;" remove="background-position: 50% 0;" separator=" "/>
-        <attribute name="data-oe-shape-data">{"shape":"web_editor/Bold/12_001"}</attribute>
-    </xpath>
-    <xpath expr="//*[hasclass('container')]" position="before">
-        <div class="o_we_shape o_web_editor_Bold_12_001"/>
-    </xpath>
-    <xpath expr="//*[hasclass('container')]" position="attributes">
-        <attribute name="class" add="container-fluid" remove="container" separator=" "/>
-    </xpath>
-    <!-- Box -->
-    <xpath expr="//*[hasclass('jumbotron')]" position="attributes">
-        <attribute name="class" add="o_cc5" remove="o_cc1" separator=" "/>
+        <attribute name="class" add="o_cc o_cc5" separator=" "/>
     </xpath>
 </template>