Set up target percentage of free space in Google Drive

[teimuraz1962]

Currently user has to control manually lasted free space in Googel Drive during upload of files.

The result is 99% full Drive with limited functionality, and Google allows to compress your media to High Quality only once a day.

It will be very useful if we can set up needed free amount in gigs or percentage just from beginning.

[ylexus]

Unfortunately, after a a lot of time spent, I conclude that Google Drive API used to monitor free space is not usable for this purpose. It only allows to monitor Google Drive space in real time. Space used by content in Google Photos is reflected with a large lag. I raised an issue with them: https://issuetracker.google.com/issues/189353122.

Since I wrote a lot of code already, I think I'll release it, at least it now shows how much is uploaded during current session.