Ability to show/hide file with no content (at the moment)

[piotr-dobrogost]

lnav version v0.11.1

It seems files with no content cannot be toggled shown/hidden in the files panel which is confusing as the reason for hiding a log file is most often the type of information in the log file and not weather or not it has content (which can change in any moment). I would like to be able to show/hide a file even if its size at the moment is 0.

[tstack]

Currently, only log files can be shown/hidden. Since an empty file is considered a text file, this isn't possible. When support is added for hiding text files, this should work.