Changes:
- Split Scaling
- Added Split Preserve Center %
- When an image is being split when it is being stretched this preserves the center area
- Added Split Repeat Width
- When this is 0 there is no repeat
- If this is larger than 0 this sets the width of the repeated area
- Fixed Split mode scaling when following wider horizontal aspect
- Added Split Preserve Center %
- Fixed some corner parameters not forcing update of the graphics cache
- Added Brightness parameters for the different sides of the bezel to help create directional lighting
- SMOOTH-ADV now uses mask 3 to add some more phosphor-ish texture to the screen