Character stat page buttons do not function on high resolutions

[IAmTrial]

The buttons for the second page of the stats page do not work correctly when playing the game with higher resolutions. This is because the macro isOnStatsPage in newInterfaces.h has hardcoded values that make assumptions about the size of the screen.

Two ways to fix it is to either dynamically calculate these values used for checking, or remove the macro and all instances of it.