[REF] portal, website: portal LESS files cleaning

- website.ui.less was moved to portal for no reason
- rename portal_frontend.less to portal.less

addons/portal/views/assets.xml

@@ -2,10 +2,9 @@
 <odoo>
     <template id="assets_frontend" inherit_id="web.assets_frontend" name="Portal Assets">
         <xpath expr="//link[last()]" position="after">
-            <link rel="stylesheet" type="text/less" href="/portal/static/src/less/website.ui.less"/>
             <link rel="stylesheet" type="text/less" href="/portal/static/src/less/website.wrapwrap.less"/>
             <link rel="stylesheet" type="text/less" href="/portal/static/src/less/bootstrap.extend.less"/>
-            <link rel="stylesheet" type="text/less" href="/portal/static/src/less/portal_frontend.less"/>
+            <link rel="stylesheet" type="text/less" href="/portal/static/src/less/portal.less"/>
         </xpath>
         <xpath expr="//script[last()]" position="after">
             <script type="text/javascript" src="/portal/static/src/js/portal.js"></script>

addons/website/views/website_templates.xml

@@ -20,6 +20,7 @@
 
 <template id="assets_frontend" inherit_id="web.assets_frontend" name="Website Assets">
     <xpath expr="//link[last()]" position="after">
+        <link rel="stylesheet" type="text/less" href="/website/static/src/less/website.ui.less"/>
         <link rel="stylesheet" type="text/less" href="/website/static/src/less/website.ui.components.less"/>
         <link rel="stylesheet" type="text/less" href="/website/static/src/less/website.snippets.less"/>
         <link rel="stylesheet" type="text/less" href="/website/static/src/less/website.zoomodoo.less"/>