Currently we're repeating virtually the same code *four times* when fetching the bitmap-data, which seems unnecessary. Also, ensure that the `#bitmapPromise` is always `null`ed by moving that into the `StampEditor.#getBitmapDone` method.
Currently we're repeating virtually the same code *four times* when fetching the bitmap-data, which seems unnecessary. Also, ensure that the `#bitmapPromise` is always `null`ed by moving that into the `StampEditor.#getBitmapDone` method.