RFR: 8280020: Underline and line-through not straight in WebView

[Jay Bhaskar]

On Thu, 10 Feb 2022 11:36:38 GMT, Jay Bhaskar <duke at openjdk.java.net> wrote:

> Issue: The end point of  line in drawLinesForText , add thickness to the endPoint.y(). In this case origin which is start point and the end point would not be same, and line would be drawn not straight.
> Solution: Do not add thickness to the y position of end point of line.
> Start Point(x,y) ----------End Point(x + width, 0)

[PageFillTest.java](https://github.com/openjdk/jfx/tree/master/tests/system/src/test/java/test/javafx/scene/web/PageFillTest.java) this example only for taking snapshot and read color property. It will not help to test line drawing.

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PR: https://git.openjdk.java.net/jfx/pull/731