Wix4: Release - v2.1.6.0

• #1503: %AppData% folder no replace by path wix4
• #1493: Question : Make Wix# Wix Toolset v5 compatible
• #1491: How to set title and description for CustomDialogWith<T>
• #1310: Problem during dynamic localization
• Enhancement #1497: MSI language
• Improved algorithm for locating compatible version of installed WiX extension file.
• Added extension method for reading localized strings from wxl files: product.LocalizationFile.GetLocalizedString("ProductName")