Show which client performed an operation

[ChristophWurst]

Steps to reproduce

1. Change files with a client application
2. Open activities

Expected behaviour

See which client performed the operation. We could get this information from the app token if one is used.

Actual behaviour

Not shown right now

[mzed2k]

Hello,

it also would be super nice to see a status of e.g. the desktop client like "idle", "uploading", "downloading", etc.
Thanks,
Martin