Custom user interface functions

ui.any()	Defines a value input widget to be used in dialog()
ui.colour()	Defines a colour selector widget to be used in dialog()
ui.dialog()	Builds a popup editor and reads back user input
ui.icon()	Defines an icon drop area widget to be used in dialog()
ui.option_menu()	Defines an combobox widget to be used in dialog()
ui.slider()	Defines a slider widget to be used in dialog()
ui.toggle()	Defines on/off toggle buttons to be used in dialog()