Flip the navigation arrow for RTL languages in iOS navigation tile

[hossam-96]

The package doesn't support RTL languages by default.
The arrow needs to be flipped to the left.

Here are the RTL language codes to help you out

RTL_LANGS = ["ar", "arc", "dv", "fa", "ha", "he", "khw", "ks", "ku", "ps", "ur", "yi" ]