Returns the time (in ms) that should elapse after an event triggering
     * tooltip showing has occurred (e.g. mouse over) before the tooltip is
     * shown. If a tooltip has recently been shown, then
     * {@link #getQuickOpenDelay()} is used instead of this.
Returns the time (in ms) that should elapse after an event triggering
     * tooltip showing has occurred (e.g. mouse over) before the tooltip is
     * shown. If a tooltip has recently been shown, then
     * {@link #getQuickOpenDelay()} is used instead of this. | VTooltip.java