notes: highlight notes linked via /posts/456#note-123.

app/assets/stylesheets/common/000_vars.scss

@@ -27,6 +27,8 @@ $preview_flagged_color: #F00;
 $preview_sample_warning_color:  hsl(0,  100%, 90%); // light red
 $preview_quality_warning_color: hsl(50, 100%, 90%); // light yellow
 
+$note_highlight_color: $preview_pending_color;
+
 $error_color: hsl(0, 100%, 95%); // light red
 $success_color: hsl(120, 100%, 95%); // light green
 

app/assets/stylesheets/specific/notes.scss

@@ -92,6 +92,10 @@ div#note-container {
         vertical-align: middle;
       }
     }
+
+    &.note-box-highlighted {
+      outline: 2px solid $note_highlight_color;
+    }
   }
 }