RFR: 8206253: No/Wrong scroll events from touch input in window mode [v2]

[Jose Pereda]

> This PR changes the parameter names to accommodate class calculations related to screen event coordinates (AbsX, AbsY).
> 
> As [discussed](https://bugs.openjdk.java.net/browse/JDK-8206253?focusedCommentId=14405707&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14405707), the sendScrollXXXEvent methods are currently passing the screen coordinates (AbsX, AbsY) to the local ones, but they shouldn't modify those, but the screen ones.
> 
> Tested successfully on Android with ComboBox controls in different positions.

Jose Pereda has updated the pull request incrementally with one additional commit since the last revision:

  Refactor parameter names

-------------

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/420/files
  - new: https://git.openjdk.java.net/jfx/pull/420/files/eab42ceb..fedc68a6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=420&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=420&range=00-01

  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jfx/pull/420.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/420/head:pull/420

PR: https://git.openjdk.java.net/jfx/pull/420