core&ui: add setting provider

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

@@ -2,7 +2,7 @@
   <div class="row"><div class="columns clearfix">
     <div class="float-left">
       <a class="header--mobile__domain" href="/" target="_self">
-        <img src="{{ UiContext.domain.nav_logo_dark or UiContext.nav_logo_dark }}">
+        <img src="{{ ctx.setting.get('ui-default.nav_logo_dark') }}">
       </a>
     </div>
     <div class="float-right">

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) }}