Fix tooltip's CSS when not in default position
Fix tooltip's CSS when not in default position

Sometimes the tooltip (the bubble shown when hovering over (?) help
icon), if there's no space available, can't be shown in its default
place (to the right of the help icon) and another place (like the top of
the help icon) is chosen.

In that case, the tooltip's pointing arrow would be black and in the
wrong position.

This commit fixes this CSS issue.

aznashwan/coriolis-web,aznashwan/coriolis-web