Custom user interface functions

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