Make Tooltip not consume auto-hiding events by default

This came up during review of JDK-8190411.

Current behavior:
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Tooltip has consumeAutoHidingEventsProperty which defaulted to true. This results in Tooltip (if visible) consuming mouse press events.
For example: If Tooltip is visible on a Slider, then the first mouse click on slider track hides the Tooltip. Another mouse click is needed on the slider track to make slider thumb move to that position.

Expected behavior:
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We should consider changing the default value of consumeAutoHidingEventsProperty for Tooltip to false, so that they will not consume auto-hiding events by default.