(frontend) Links in Resources folder are shown on main group page

[ToCodeForFreedom]

I added two links in a folder in the Resources section. However, the links are shown on the main Resources page. In the image below, the two links should not be visible, as they are in the folder "Vegan kaasrecepten (tried & tested!)"

As shown here, the two links are actually located within the folder:

[CoenHolten]

Same issue as #12