progress-info: allow finished infos to remain alive
We want to not hide the operations and the operations button in the toolbar if the popover is open. For that, we need to allow operations widgets to remain alive even when the operation is finished. For that we need to add a new status state to copying/moving/trashing, like copied/moved/trashed. On the way, improve the wording of file-operations to match the mockups, and also make the report operations code more consistent to each other.
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