[fix] simple theme: /preferences: cookies table is LTR

close #827

searx/static/themes/simple/src/less/preferences.less

@@ -82,10 +82,11 @@
 
   table.cookies {
     width: 100%;
+    direction: ltr;
 
     th,
     td {
-      .ltr-text-align-left();
+      text-align: left;
       font-family: monospace;
       font-size: 1rem;
       padding: 0.5em;