I noticed that the new Steam Calendar has this feature where you can ignore a game in your calendar list simply by clicking on the upper left gray button.

I would like that to be present as well in promotional pages. I mean themed or special sales.

On the main page we can use the "..." button to manage games, and that's fine, but on sales pages there is nothing quickly available.

I think if the feature on the Steam Calendar was implemented on the sales pages, that would be pretty good. The sale pages have a quick "Add to wishlist" button, but no "Ignore" button, and I feel that it should also be available for the consumer.