Add pop up/tour for the identification stage of curation

[jdkent]

Also, Identification still felt confusing to me. Especially if I only add one Search, it was not clear what I should be doing. Perhaps we really need to add a tour to the PRISMA curation workflow that pops up and says "Hey, you're on identification, if you have no duplicates, click next to continue". OR simplify this step further like I said earlier. i.e. just summarize the # of duplicates and give ppl a chance to manually confirm but most ppl will just trust the automated job and click next

[nicoalee]

a tour would be useful, but im also wondering if this will be addressed by #1072