Progress when uploading multiple files

[pilsnerbeer]

Is your feature request related to a problem? Please describe.

uploading a bunch of files (photos/videos from vacation.) is a usual thing to do using the android app. when doing so, the upload notification should reflect on global progress of the process. Current solution doesnt inform the user on how many files are left to upload.

Describe the solution you'd like

A simple text clue will do. For instance: 24/50 or 3 files left etc. Place in the notification area.

[tobiasKaminsky]

Duplicate of #6008, also by you ;-)