This adds edge cases to the existing logic that checks the
vertex UV values to fix stretched BG videos on 11 to 17
already.
However, 9 and 10 also show this issue on modern GPU
hardware though it does not appear on all BG videos but
only on videos from 1st to 3rd style songs.
This commit addresses that issue by adding the missing
checks to the existing logic. Additional refactoring of
configuration naming etc. to match the extended
functionality is included.
Affects all games based on version 18 and 19 which includes
the chinese versions
This code is based on the toastertools implementation.
Credits to the original authors.
