RFR: 8328482: Convert and Open source few manual applet test to main based [v3]

[Tejesh R]

> Convert and open source these manual applet test to main based:
> java/awt/Frame/MegaIconTest/MegaIconTest.html
> java/awt/Frame/FrameMaximizedTest/FrameMaximizedTest.html
> java/awt/Frame/FrameMinimizeTest/FrameMinimizeTest.html
> java/awt/Frame/SizeMinimizedTest/SizeMinimizedTest.html

Tejesh R has updated the pull request incrementally with three additional commits since the last revision:

 - Images updated
 - Frame position updates
 - removed headful tag

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18448/files
  - new: https://git.openjdk.org/jdk/pull/18448/files/433086cb..40c89e96

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18448&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18448&range=01-02

  Stats: 13 lines in 6 files changed: 0 ins; 10 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/18448.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18448/head:pull/18448

PR: https://git.openjdk.org/jdk/pull/18448