Button that comes with the popover mixin. Essentially only difference between this and FwPopoverIcon is that the tagName is button
rather than i
.
container
UnknownContainer for the popover, set to 'body' to prevent parent styling from modifying the popover
placement
UnknownPlacement of the popover (top, bottom, left, right, or auto) auto is a special placement which will appear top or bottom based on location on the screen