Better context for paper reviewing module

[jbenito]

[From a very frustrated PR manager]

There is no easy browser path between the paper reviewing section (showing e.g. "Judge as Referee") and the submission reviewing part ("Material to review") etc. I.e. once a submission is opened one has to go back into the conference / paper reviewing, re-enter the filters etc. It would be nice if there is less of a context switch between the reviewing overview and the paper review pages.