Feature summary:
Allow an NPP reviewer to filter the New page queue based on which articles were marked as reviewed by a particular reviewer .

UI Changes:
A new filter in the "Filters" popup, within the "That:" section. "Were previously reviewed by <TextBox>".

Benefits:
When an NPP reviewer is banned, all the articles that they reviewed need to come back under the scanner and hence they are marked as unreviewed. Having this filter would help other reviewers to quickly go through their work.