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 [enum TextAlign] 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. When enabled, the button's icon will expand/shrink to fit the button's size while keeping its aspect. 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.