[FIX] website: confusion/dangerous config options for CDN

Users are tempted to enable all features they
see under the former "Speed" section of the
website settings, even if they have no idea
what they do.
One of them was `CDN Base URL` and had a default
value that was wrong and very likely to break
your website if enabled by mistake.

This commit replaces the default value with
a placeholder that looks more like a `sample`
URL, and makes the fields required when the
CDN option is enabled.

It also moves the whole "Speed" options to
technical features / debug mode.

addons/website/i18n/website.pot

@@ -3149,7 +3149,7 @@ msgstr ""
 
 #. module: website
 #: model:ir.ui.view,arch_db:website.view_website_config_settings
-msgid "Speed"
+msgid "Optimization"
 msgstr ""
 
 #. module: website

addons/website/models/website.py

@@ -179,7 +179,7 @@ class website(osv.osv):
         'company_id': lambda self,cr,uid,c: self.pool['ir.model.data'].xmlid_to_res_id(cr, openerp.SUPERUSER_ID,'base.main_company'),
         'compress_html': False,
         'cdn_activated': False,
-        'cdn_url': '//localhost:8069/',
+        'cdn_url': '',
         'cdn_filters': '\n'.join(DEFAULT_CDN_FILTERS),
     }
 

addons/website/views/res_config.xml

@@ -100,8 +100,8 @@
                                     <label for="module_website_version"/>
                                 </div>
                             </div>
-                            <label for="id" string="Speed"/>
-                            <div>
+                            <label for="id" string="Optimization" groups="base.group_no_one"/>
+                            <div groups="base.group_no_one">
                                 <div>
                                     <field name="compress_html"/>
                                     <label for="compress_html"/>
@@ -109,11 +109,16 @@
                                 <div>
                                     <field name="cdn_activated"/>
                                     <label for="cdn_activated"/>
-                                </div><div>
+                                </div>
+                                <div attrs="{'invisible': [('cdn_activated', '=', False)]}">
                                     <label for="cdn_url"/>
-                                    <field name="cdn_url" attrs="{'invisible': [('cdn_activated', '=', False)] }"/>
+                                    <field name="cdn_url"
+                                           attrs="{'required': [('cdn_activated', '=', True)]}"
+                                           placeholder="//mycompany.mycdn.com/"
+                                           t-translation="off"/>
                                     <label for="cdn_filters"/>
-                                    <field name="cdn_filters" attrs="{'invisible': [('cdn_activated', '=', False)] }"/>
+                                    <field name="cdn_filters"
+                                           attrs="{'required': [('cdn_activated', '=', True)]}"/>
                                 </div>
                             </div>