RFR: 8254759: [TEST_BUG] [macosx] javax/swing/JInternalFrame/4202966/IntFrameCoord.html fails

[DamonGuy]

Closed repo test fix from the test sprint. This test was approved in the closed repo and has been converted to an open repo test.

This test checks if the coordinates are still correct after changing focuses between different JInternalFrames. The test is now automated instead of manual like the previous, closed version. This needs to be a headful test to allow robot to click on the different frames and to check coordinates.

The issue was that in MacOS, the button wouldn't appear at a normal size. To fix this, the bounds have been increased to allow the button to be fully visible with the designated frame sizes on all L&Fs.

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

Commit messages:
 - Moved test from closed repo to open repo.

Changes: https://git.openjdk.java.net/jdk/pull/8444/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8444&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254759
  Stats: 145 lines in 1 file changed: 145 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8444.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8444/head:pull/8444

PR: https://git.openjdk.java.net/jdk/pull/8444