Nested menu items are not readable

[schneekluth]

Describe the bug
When using nested menus items are not readable.

To Reproduce
Steps to reproduce the behavior:

1. Create a nested menu item:

   [[main]]
     name = "tax"
     weight = 40
   
   [[main]]
     name = "Categories"
     parent = "tax"
     url = "/categories"
     weight = 43

2. Launch preview server
3. Hover over nested parent.

Expected behavior
A readable list of nested menu items.

Screenshots

nshots**

Desktop (please complete the following information):

• OS: [e.g. Windows 11, OSX 15}
• Browser: Chrome (129), Firefox (131)

Hugo & Blowfish versions
Which version of Hugo and Blowfish are you using?

• Hugo: 135.0
• Blowfish: 2.78.0

Additional Info
Example screenshot uses default theme blowfish but can also be reproduced with noir theme.