XML import and export interface reviewed.
Show more infos about the error if app import fails
Added nicer error message when app installation fails.
Minor corrections in package manifest
Fixed: Required hyperlink field shows invalid message as soon as the form is open (before the user can input something)
Fixed issue: Enhance "required" field support
Font color of required field indicator is sometimes red (on a red background)
Fixed validation of number fields
Merge branch '2sxc-6.4' into SimpleDataImportExport
Missing files added.
Merge branch 'SimpleDataImportExport' of https://github.com/2sic/2SexyContent
Renamed user role for designers to '2sxc designers'
Increased version numbers to 06.03.05
Prototype of appconfig dialog
Finished AppConfig
Removed unnecessary comments
Moved "add item" function to Web API
Removed unneeded code (add item functionality moved to web api)
Added error handling to add item functionality
Template selection