Standard themed Button. Button is the standard themed button. It can contain text and an icon, and will display them according to the current [Theme]. Text alignment policy for the button's text, use one of the [code]ALIGN_*[/code] constants. When this property is enabled, text that is too large to fit the button is clipped, when disabled the Button will always be wide enough to hold the text. Flat buttons don't display decoration. Button's icon, if text is present the icon will be placed before the text. The button's text that will be displayed inside the button's area. Align the text to the left. Align the text to the center. Align the text to the right.