[FIX] theme_*: make s_picture image responsive by default

Some themes were making the s_picture image responsive on their own. It
is now done generically, so the theme extensions must be removed to be
able to merge.

task-3266862

closes odoo/design-themes#787

X-original-commit: 08cb536b02
Related: odoo/odoo#157813
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

theme_paptic/views/customizations.xml

@@ -290,7 +290,7 @@
     </xpath>
     <xpath expr="//img" position="attributes">
         <attribute name="src">/web_editor/shape/theme_paptic/s_picture.svg?c1=o-color-1</attribute>
-        <attribute name="class" add="img-fluid" remove="img-thumbnail" separator=" "/>
+        <attribute name="class" remove="img-thumbnail" separator=" "/>
     </xpath>
 </template>