core&ui: add setting provider

packages/ui-default/templates/partials/nav.html

@@ -10,7 +10,7 @@
   <div class="row"><div class="columns clearfix">
     <ol class="nav__list nav__list--main clearfix">
       <li class="nav__list-item">
-        <a href="/"><img class="nav__logo" src="{{ UiContext.domain.nav_logo_dark or UiContext.nav_logo_dark }}"></a>
+        <a href="/"><img class="nav__logo" src="{{ ctx.setting.get('ui-default.nav_logo_dark') }}"></a>
       </li>
       {%- for item in overrideNav|default(ui.getNodes('Nav')) -%}{% if item.checker(handler) %}
         {{ nav_item(item) }}