a11y: link map label to map content (#88645)

tests/admin_pages/test_form.py

@@ -1987,7 +1987,7 @@ def test_form_preview_map_field(pub):
     app = login(get_app(pub))
     resp = app.get('/backoffice/forms/1/')
     assert 'qommon.map.js' in resp.text
-    assert resp.pyquery('#map-f1')
+    assert resp.pyquery('#form_f1.qommon-map')
 
 
 def test_form_preview_do_not_log_error(pub):

wcs/qommon/templates/qommon/forms/widgets/map.html

@@ -2,7 +2,7 @@
 
 {% block widget-control %}
   <input type="hidden" name="{{widget.name}}$latlng" {% if widget.value %}value="{{widget.value}}"{% endif %}>
-  <div id="map-{{widget.get_name_for_id}}" class="qommon-map"
+  <div id="form_{{widget.get_name_for_id}}" class="qommon-map"
        {% if widget.readonly %}data-readonly="true"{% endif %}
        {% if widget.sync_map_and_address_fields %}data-address-sync="true"{% endif %}
        {% for key, value in widget.map_attributes.items %}{{key}}="{{value}}" {% endfor %}