Count of categories on explore page and media detail page side panel

[Tocacar]

Now that we have to add a category to a media item multiple times (once for each programming language) if it applies to all languages, the count of categories in the explore page and side panel on the media detail page is misleading.

For example, the Think Like A Programmer series is in the category 'Think Like A Programmer'. The media items in this series are not specific to any language and therefore apply to all, so the category has to be applied multiple times:

Think Like A Programmer (PHP)
Think Like A Programmer (JavaScript)

We have to either stop providing a count of categories, or find a way of assigning a category to items that span multiple/all languages only once.