The Cascading Style Sheet class of the prompter button when the mouse is moved over it.
Default value
'std_prompter_button_mouseover'. This is the default mouseover class for the prompter button and is provided with all shipped cascading style sheets.
Valid values
Any valid class name from the Cascading Style Sheet, in single quotes. A list of available classes can be selected from by clicking the corresponding dropdown button in the property sheet.
