Extend Session Time for Large Uploads

[usaboxer]

Filebrowser seems to timeout around two hours. When uploading a 20gib file over a slow connection it estimates 3-4 hours. It drops connection about halfway through.

A simple input for this in the settings would be a great fix.

I cannot figure out how to make the adjustment manually. If there is an easy way that would be ok too!

[kloon15]

Its also quite annoying to have to log in every 2 hours.
While a changeable expiry date would indeed be a simple fix, the main issue with the current implementation is if the token gets leaked it can cause big problems if it has a long expiry.