macOS: Textures and examples are downloaded in different location by default

Steps:

• Download some example from Welcome page -> Examples
• -> example is downloaded by default in /Users/user/QtDesignStudio (this path was used because of https://bugreports.qt.io/browse/QDS-6305, https://bugreports.qt.io/browse/QTCREATORBUG-26705)
• Dowload some texture in Content Library view -> Textures
• -> texture is downloaded in /Users/user/Documents/QtDesignStudio
• -> expected is that all downloads would go by default to same location
• If permisson issue on macOS is fixed for QDS4.0, should the default location for examples then be changed to Documents folder?