Improved collaboration support and support for units including MFP-units that lack Javascript browser support.

• Internal optimizations and memory allocation improvements
• Added support for Apple iOS home screen icon
• Updated HTTP headers to properly follow RFC 5987
• Made WebAdmin more responsive in regards to user input
• Improved WebDAV subsystem for increased performance and stability
• Added internal support for UNC resources with separate access credentials
• Minor UI improvements to Web Admin interface
• General optimizations, stability and internal improvements to the built-in HTTP(S) client
• Added a-links for files and folders in the built-in HTTP(S) client to allow for browsers without Javascript support to download files
• Fixed a few memory leaks related to internal management routines and (S)FTP(S) connections
• Added disk write caching
• Optimized logon routine for better performance when using Active Directory integration
• Fixed problem with limitations for links not being properly read in non ISO countries