Correctly emulate SRAM register in SSFII mapper.
NOTE: This fix re-uses the cart property cart.hw.bankswitch to store the bank that is swapped out for SRAM when the register is active. This is convenient since the bottom bank cannot be swapped out and we still want bankswitch to be non-zero
window resizes by itself if no maintain aspect ratio is forced
todo: states have broken graphics in that mode, but that's likely the original core thing
alyosha-tas