Allow tooltips in EuiContextMenuItem

[timroes]

It would be nice if we would have a property to specify a tooltip for an EuiContextMenuItem. You unfortunately cannot build that with the current components, since the EuiTooltip element needs to wrap the actual trigger, meaning you would need to pass something like the following:

const items = [
  <EuiToolTip><EuiContextMenuItem/><EuiToolTip>,
  <EuiToolTip><EuiContextMenuItem/><EuiToolTip>
];
return <EuiContextMenu items={items}/>;

Unfortunately that breaks the styling of the panel and kills all keyboard controls, since the EuiContextMenu doesn't have the EuiContextMenuItem as direct children anymore.

Thus I would suggest to allow specifying a tooltip via property on EuiContextMenuItem. It would be super useful, since we then could possibly show explanation. My use-case would currently be to be able to show a help text, what "formatted CSV" and "raw CSV" is in the download popover in Inspector: