Automatically remember and restore window maximization state
Independently from remembering window sizes per-document-type (i.e. per aspect ratio?) and other complicated questions from the remainder of issue #20 (and its predecessor, GNOME/evince#319)…
…there is also the fact that Papers (and before that, Evince) never remembered the window's maximization state.
I believe auto-remembering maximization state (without influencing the saved width/height values) would make a lot of sense, particularly on high-resolution-but-not-2x-HiDPI laptops (especially anything with a <= 14" screen), which may show up with a window that is not maximized, and the somewhat small physical screen makes you want to always open documents maximized anyway.
Many people requested this feature before, as can be seen in GNOME/evince#1422 and its various duplicates. Opening it here for consideration. I think it would match the behavior of many applications out there.
Presumably it could be done at the application-global level, instead of per-document-aspect-ratio; in that case, I believe implementing this could be easy for a newcomer.