[oscar theme] center search on index and use logo with ponthi

searx/static/themes/oscar/src/less/logicodev/search.less

@@ -32,7 +32,7 @@
 }
 
 #main-logo{
-    margin-top: 10vh;
+    margin-top: 24vh;
     margin-bottom: 25px;
 }
 

searx/templates/oscar/index.html

@@ -4,7 +4,7 @@
     <div class="row">{{- "" -}}
         <div class="text-center col-sm-12 col-md-12">
             {%- if cookies['oscar-style'] == 'pointhi' -%}
-                <h1 class="text-hide center-block"><img class="center-block img-responsive" src="{{ url_for('static', filename='img/searxng-logo.svg') }}" alt="searx logo"/>SearXNG</h1>
+                <h1 class="text-hide center-block"><img class="center-block img-responsive" src="{{ url_for('static', filename='img/searxng.svg') }}" alt="searx logo"/>SearXNG</h1>
             {%- else -%}
                 <div class="text-hide center-block" id="main-logo">{{- "" -}}
                     <img class="center-block img-responsive" src="{{ url_for('static', filename='img/searxng.svg') }}" alt="searx logo" />SearXNG{{- "" -}}