Upload list action icon for failed/pending uploads

[jancborchardt]

trafficstars

Follow-up to https://github.com/nextcloud/android/pull/3472

After looking at it again I had the initial confusion of "But how do I retry a failed upload?" since only the delete action is so present.

We should instead have a 3-dot icon which includes both "Retry" and "Cancel" (and cancel using the x icon, not delete as it does not delete a file).