RFR: 8261221: Tooltip bigger than screen size blinks - shows and hides over and over again [v2]

[Paweł Kruszczyński]

> `Tooltip` is no longer hiding upon receiving `MouseEvent.MOUSE_ENTERED_TARGET` event inside it. Pressing mouse on overlaying tooltip also kills the tooltip, so the infinite duration tooltip can be closed.

Paweł Kruszczyński has updated the pull request incrementally with one additional commit since the last revision:

  8261221: Tooltip bigger than screen size blinks - applying reviewed fixes

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/395/files
  - new: https://git.openjdk.java.net/jfx/pull/395/files/bc6aaba7..3fb62625

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=395&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=395&range=00-01

  Stats: 10 lines in 1 file changed: 0 ins; 1 del; 9 mod
  Patch: https://git.openjdk.java.net/jfx/pull/395.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/395/head:pull/395

PR: https://git.openjdk.java.net/jfx/pull/395