Maximum window size

[mel_o]

Currently, the maximum window size (as specified by the validators for "app-width" and friends in HumanClientApp.cpp@L100) is 2560 x 1600. I've used this as the maximum UI window size in a recent branch for the sake of consistency and adrian_broher brought up concerns about this being too small for large monitors and multi-screen displays. I'm not familiar with the latest high-res displays so I thought I'd bring the question here: what should the maximum be? I imagine we could just set it absurdly high in the validator because SDL supplies us with the list of supported resolutions, although that would only limit the fullscreen size and not the windowed size.

[MatGB]

Not my field, but if there is to be a max then

Technically, "Ultra High Definition" is actually a derivation of the 4K digital cinema standard. However while your local multiplex shows images in native 4096 x 2160 4K resolution, the new Ultra HD consumer format has a slightly lower resolution of 3840 X 2160

I don't know what 4K monitors are likely to display at, I'm guessing there'll be some capable of the higher values, so I'd go for that.

[pheldens]

DisplayPort: 3840 x 2160 (60Hz, 16:9 aspect ratio)
sexy monitor plug http://www.eizoglobal.com/products/flex ... 237/#tab02