cannot expand parent dir when it contains a hidden subdir

[douchey]

When selecting music folders, if a parent directory contains a hidden subdirectory (any directory name starting with a period), the parent directory cannot be expanded to select regular (non-hidden) subdirectories - it appears flat as though it has no subfolders. This prevents normal subdirectories from being selected, forcing you to select the parent and all subdirectories. Removing the hidden subdirectory and re-loading the music folder selection screen allows the regular subdirectories to be selected. To reproduce, place a hidden subdirectory in a directory with normal subdirectories.