Exclude subfolders from content folder in small navbar

[imfing]

Discussed in https://github.com/imfing/hextra/discussions/240

^{Originally posted by JayanthR19 January 4, 2024} Hi Team,

we have few subfolders in content folder that we don't want to display in navbar. For that we removed the entries from hugo.yaml menu section. After this folders are not getting displayed in big screens but when we are opening the site in a small screen the folders are getting listed in navbar.Please let us know do we have any options to address this.