In elastic/kibana#107292 @cchaos suggested to use a tooltip to give instruction on how to interact with the keyboard on a component. This works well except that, when the tooltip is shown if we mouse out it disappears.

I suggest that we add a new alwaysVisible optional prop to the <EuiToltip /> component which will always display the tooltip and not react to mouse events. The consumer would then be responsible to hide it if needed.