Refactor toggles to work without JS, add specs

app/views/admin/settings/services/_lndhub.html.erb

@@ -10,7 +10,6 @@
   <% if Setting.lndhub_enabled? %>
     <%= render FormElements::FieldsetComponent.new(title: "API URL") do %>
       <%= f.text_field :lndhub_api_url,
-        tag: "li",
         value: Setting.lndhub_api_url,
         class: "w-full", disabled: true %>
     <% end %>
@@ -32,7 +31,6 @@
   <% if Setting.lndhub_keysend_enabled? %>
     <%= render FormElements::FieldsetComponent.new(title: "Public key", description: "The public key of the Lightning node used by LNDHub") do %>
       <%= f.text_field :lndhub_public_key,
-        tag: "li",
         value: Setting.lndhub_public_key,
         class: "w-full", disabled: true %>
     <% end %>