Move empty state and error state closer to designs
* window: Move empty state closer to designs
Add a Open… button and use the camera icon
* window: Move error state closer to designs
Add a "Try Again" button and use the warning icon
* window: Reindent
No functional change. Do this in a separate commit to ease rebasing.
* window: Use a parameter on the action for seeking
We use millisecons resolution as we're limited to int32 ('i') as int64
('x') doesnt work.