Setup bootstrap popover
spec_popover(
  content = NULL,
  title = NULL,
  trigger = "hover",
  position = "right"
)content for pop-over message
title for pop-over message.
Controls how the pop-over message should be triggered.
Possible values include hover (default), click, focus and manual.
How the tooltip should be positioned. Possible values are
right(default), top, bottom, left & auto.