* Implement SwKbd GUI
* Relocate UI handler to Emu Context from Config
Also create a common interface for UI handlers in the context and specialize for Gtk
Add basic input length validation in InputDialog
* Add Transfer Memory support to AppletCreator
Read Initial Text for SwKbd using Transfer Memory
* Improve InputDialog widget
Improve length validation
Has extra label to show validition info
Handle potential errors and log them
* Misc improvements
* Improve string validation
* Improve error handling
* Remove tuple in struct
* Address formatting nits
* Add proper Cancel functionality
Also handle GUI errors in UI handler
* Address jD's comments
* Fix _uiHandler init
* Address AcK's comments
