configurable temporary folder path.

[hungminhtran]

Right now, I use this app to remote view video content generated from CCTV system. The issue is: vlc in many distro distributes via snap, which is only work for content in current user home folder. Filesremote however downloads temporary data in /tmp/xxx folder.

It would be nice if we can support configure temporary folder path, eg: download data to ~/tmp/xyz folder for example.