Network: Add a button to refresh the folders' list + folders' content

This is a feature request of a user that would like to be able able to refresh the folders's list and its content while browsing in the Network tab.

Here is the ticket mentioning the request: https://code.videolan.org/videolan/ios-support/-/issues/63392

changed milestone to %4.0.0

added Feature Network user feedback labels

assigned to @diogo.simao-marques

This should not be a button. Pull to refresh needs to be implemented correctly. The UI is already there but until VLCKitv4 it was not possible within libvlc to re-list a folder's content.