am 7e48a700: (-s ours) Use SWT to write PNG screenshot now that we moved to SWT 3.3+ (do not merge)

Merge commit '7e48a7003ad28f8b45a45a24fc479b3a237727f1' into eclair

* commit '7e48a7003ad28f8b45a45a24fc479b3a237727f1':
  Use SWT to write PNG screenshot now that we moved to SWT 3.3+ (do not merge)