Some Image sizes are missing

[zdavatz]

Some images sizes are still missing:

iPhone Portrait iOS 8,9@Retina HD 5.5: 1242x2208
iPhone Portrait iOS 8,9@Retina HD 4.7: 750x1334

iPhone Landscape iOS 8,9@Retina HD 5.5: 2208x1242

and

iPhone X Portrait iOS 11+: 1125×2436
iPhone X Landscape iOS 11+: 2436x1125

See:

https://stackoverflow.com/questions/39900225/ios-launch-image-for-all-devices-include-ipad-pro