Loading popup

[chancehudson]

We now potentially have a queue of items. It would be good if the loading screen had interactivity. Like if a queue item errors we might want to ask the user if they want to "skip this operation or try again". Then if they skip we may want to ask if they want to continue with the queued tasks?

@ChialiTsai Were you planning to remove the current loading box and replace it with a view below the progress bar?