Nachet Mini Feature Request Queue classification requests via checkboxes

> I have noticed you can queue multiple images for classification by clicking on each image and then clicking the Identify button, but you can't do it by selecting their checkboxes and then clicking the button. This would be convenient in instances when you have uploaded multiple images that need classification (such as during user testing , but could also occur in regular use, for example with a microscope that doesn't provide a direct camera feed or isn't connected directly to the internet).

Start by tracing how image checkbox selections are stored and how the Identify button currently queues individually selected images; the issue names no files or tests. Done means selecting multiple image checkboxes and clicking Identify queues those images for classification, matching the existing click-and-Identify behavior.

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