A DESCRIPTION OF THE PROBLEM :
Tooltip very often is required when user can't see the full text because of some reasons. Classic example is when user works with table - if the width of the cell is less then the length of the text and text is ellipsized(...) then we need tooltip to show user full text without changing the width of the column. However, javafx doesn't let to add tooltip only for cases when text is ellipsized and because of this we get too many tooltips - on every cell of the table! So I suggest to add possibility to show tooltip only when some text is ellipsized. The issue was discussed here https://stackoverflow.com/questions/45614922/how-to-show-tooltip-only-on-those-table-cells-which-text-is-ellipsized