Added Catalan translation
Small fixes

- minor fix

Optimized for latest iPhone resolutions.

- updated for iPhone 12, 12 Pro, 12 Pro Max screen resolutions

- minor user interface updates; miscellaneous

- image optimization; smaller app size

- updated for new iPad screen resolution.

- user interface optimization for new iPad models

- updated for optimization of new screen resolutions

- fixed alignment issues on 10.5" iPad, iPhone X

Updated for iOS 11.