Merge pull request #1126 from kvch/minor-logicodev-dark-changes

Logicodev-dark fixes

searx/static/themes/oscar/less/logicodev-dark/oscar.less

   background: #d9534f;
 
 }
+
+.well {
+  background: #444;
+  border-color: #282a2e;
+}
+
+.highlight {
+  background-color: transparent !important;
+}