Add menu items for 'retry' and 'abort' on detail view
wip
Click on failed item now shows detail view

Can restart from there. Abort button is not yet fully functional.
Update menu after rotation on detail view

Fixes losing the 'failed' vs 'ok' upload state in the menus on rotation
in Android 2.3.
Make delete button work
Merge pull request #16 from brion/delete-failed

Retry and delete buttons for failed items