Add per display resolution and viewcount baselines

[BryanChrisBrown]

Instead of a slider the resolution in the config should be set based on the connected Looking Glass display, with options for increased or decreased quality.

In addition, the default view counts for each display should be set based on the connected display

[hybridherbst]

+1.

Some thought: I think there would also be ways to provide these "good defaults" to the browser without having to install the "Websocket Driver" which I feel is kind of problematic in corporate environments and such. For example, if LG would also advertise itself as Gamepad, the existance of it and some "default for this device" values could be transmitted without even having to install a driver and without the user having to choose anything.