[mod] more compact logicodev skin

searx/static/themes/oscar/less/logicodev/results.less

 .result_header {
-    margin-bottom:5px;
+    margin-top: 6px;
+    margin-bottom: 4px;
     font-size: 16px;
 
     .favicon {
 
 .result-content {
     margin-top: 2px;
-    margin-bottom: 4px;
+    margin-bottom: 0;
     word-wrap: break-word;
     color: @dark-gray;
     font-size: 13px;

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

 .search_categories, #categories {
-  margin: 15px 0 20px 0;
+  margin: 10px 0 4px 0;
   text-transform: capitalize;
   
   label{