[FIX] website_crm_partner_assign: filtering if no country

1. Install the demo data
2. Activate GeoIP and set your IP in Belgium [1]
3. As a non-connected user, go to '/partners'
   => No result found: expected since we want to filter the partners
   available in the user's country
4. Click on 'All Countries'
   => All partners are displayed
5. Click on 'Platinum' or search for 'azure'
   => No result found

The last step is not expected, it should filter partners from the 'All
Countries' list.

It occurs because the 'All Countries' filter is not kept when chosing a
Level or searching.

We use `keep_query` for the level filtering and set the `country_all`
`input` field for searching.

[1] IP can be set manually in
https://github.com/odoo/odoo/blob/bbb45e3412a5653d78aacc92903e95d1353ed60a/addons/http_routing/geoipresolver.py#L42

opw-2277343

closes odoo/odoo#53729

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

Author: nim-odoo

addons/website_crm_partner_assign/controllers/main.py

@@ -301,6 +301,7 @@ def partners(self, country=None, grade=None, page=0, **post):
 
         values = {
             'countries': countries,
+            'country_all': country_all,
             'current_country': country,
             'grades': grades,
             'current_grade': grade,

addons/website_crm_partner_assign/views/website_crm_partner_assign_templates.xml

@@ -34,7 +34,7 @@
                     <li class="nav-header nav-item"><h3>Filter by Level</h3></li>
                     <t t-foreach="grades" t-as="grade">
                         <li class="nav-item">
-                            <a t-attf-href="/partners#{ grade['grade_id'][0] and '/grade/%s' % grade['grade_id'][0] or '' }#{ current_country and '/country/%s' % slug(current_country) or '' }#{ '?' + (search_path or '') }"
+                            <a t-attf-href="/partners#{ grade['grade_id'][0] and '/grade/%s' % grade['grade_id'][0] or '' }#{ current_country and '/country/%s' % slug(current_country) or '' }#{ '?' + (search_path or '') + '&amp;' + keep_query('country_all') }"
                                t-attf-class="nav-link#{grade['active'] and ' active' or ''}">
                                 <span class="badge badge-pill float-right" t-esc="grade['grade_id_count'] or ''"/>
                                 <t t-esc="grade['grade_id'][1]"/>
@@ -63,6 +63,7 @@
                     <t t-call="website.pager"/>
                     <form action="" method="get" class="form-inline ml-auto">
                         <div class="form-group">
+                            <input t-if="country_all" type="hidden" name="country_all" value="True" />
                             <input type="text" name="search" class="search-query form-control" placeholder="Search" t-att-value="searches.get('search', '')"/>
                         </div>
                     </form>