Shows arrow when multiple non-nesting categories are set

[adnan360]

When categories are set like this:

categories:
  - [Featured]
  - [Tutorial]

Landscape theme shows arrows between categories, although they are not nested:

Discussed here and here

The theme displays it as nested, but if you check the Tutorial link, it should be http://yourhexo.com/categories/tutorial, not http://yourhexo.com/categories/featured/tutorial. Perhaps a theme couldn't differentiate whether a category is nested or not, but that's a separate issue.