Add "Active" state to Button

[SK060821]

Please, please, please add an "Active" state for buttons. Currently, states available are: "Default State" / "On Hover" / "On Press" / "Disabled" If we were to have available an "Active" state option, then when using buttons for page navigation or bookmarks - we wouldn't have to add additional visual elements that we then have to show or hide with corresponding bookmarks just to show the end user which interactive visual element is currently engaged.