PLT-2345 Switch "help" link below text input box to localizable version (#3794)

webapp/sass/layout/_markdown.scss

@@ -156,3 +156,26 @@ code {
     background: $white;
     color: inherit;
 }
+
+.help {
+    code {
+        background: rgba(51,51,51,0.1);
+    }
+
+    .hljs {
+        display: block;
+        overflow-x: auto;
+        padding: 0.5em;
+        color: #333;
+        background: #f8f8f8;
+    }
+
+    .container {
+        margin-bottom: 40px;
+    }
+
+    .links {
+        margin-top: 30px;
+        font-size: 1.2em;
+    }
+}