Marketplace: Issues with the font and word form in the side menu

Steps:

Go to the Marketplace and look at the menu on the left.

Expected result:

The names of all sections are either plural or singular (e.g. "Types", "Platforms", "Partners", "Categories");

The font is consistent (e.g. "All" is always in bold).

Actual result:

"Types", "Platforms" and "Partners" are plural forms, "Category" is singular;

"All" in "Partners" is in bold but in "Category" isn't. (see screenshot)