Feedback on "Important Traits" rustdoc feature

[XAMPPRocky]

@Manishearth

Yeah I tried to improve it and couldn't get anything good, would you be able to try some CSS and see what you get?

You'll want to wrap this in an appropiate media query for phone sizes only but adding this worked for me.

.important-traits .important-traits-tooltiptext {
    left: 0;
    top: 100%;
}