Feature summary (what you would like to be able to do and where):
Special:SI should support filtering (out) invalids and completes, so we can maximize time spent looking at currently open cases.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

Benefits (why should this be implemented?):
Spend time working on open cases. Alternatively, spend time reviewing not-open cases.