fun show(caption: String? = null, text: String? = null, rich: Boolean = false, align: Align? = null, size: ModalSize? = null, animation: Boolean = true, centered: Boolean = false, callback: (() -> Unit)? = null): Unit
Helper function for opening Alert window.
rich - determines if text can contain HTML code
animation - determines if animations are used
centered - determines if modal dialog is vertically centered
callback - a function called after closing window with OK button