css tooltip does not like overflow on parent div

In the flagged section when there are limited results the tooltip applied to the message icon will be hidden behind the parent div which has overflow-x:auto set. We need overflow-x to make the table kind of usable on smaller screens. One solution would be to make the parent div min-height set to 100% to allow the tooltip to use the extra space below the table, but this does not work. A solution without the use of JavaScript would be preferred.