[FIX] website_sale : remove 'Product Attribute Filter' subitems padding

Description of the task :
Make the tool as consistent as possible by making some layout quick
wins.

Current behavior before PR:
There is a padding between Product Attributes filter subitems.

Desired behavior after PR is merged:
There is no padding between Product Attributes filter subitems.

task-2438556

X-original-commit: 5a2d8dd188a80434b7006692b6c470948ad29291

addons/website_sale/views/templates.xml

@@ -553,7 +553,7 @@
                                     <ul class="nav nav-pills flex-column">
                                         <t t-foreach="a.value_ids" t-as="v">
                                             <li class="nav-item">
-                                                <label style="padding: 0.25rem 0rem; margin: 0" t-attf-class="nav-link#{' active' if v.id in attrib_set else ''}">
+                                                <label style="padding: 0; margin: 0" t-attf-class="nav-link#{' active' if v.id in attrib_set else ''}">
                                                     <input type="checkbox" name="attrib" t-att-value="'%s-%s' % (a.id,v.id)" t-att-checked="'checked' if v.id in attrib_set else None" />
                                                     <span style="font-weight: normal" t-field="v.name" />
                                                 </label>