Triplea: Pre-releases not showing pictures and gifs in notifications

[FrostionAAA]

Describe the bug
The latest pre-releases do not render images and gif files that should be displayed in notifications.

To Reproduce
You can see this when starting Iron War, Dragon War, Star Trek and other maps that have notifications during map start.

[Cernelius]

While at it, can you please add WebP images too? They are way better than all formats currently supported, especially GIF.

https://developers.google.com/speed/webp/
(here you can find a converter too)

[ron-murhammer]

I'm fairly certain this is a Java bug as I had noticed the same thing for TWW in the pre-release and tracked it down to this: https://bugs.openjdk.java.net/browse/JDK-8222250

[RoiEXLab]

This might be a good reason to switch to JDK 13

[RoiEXLab]

Nevermind, I just saw that it seems this Bugfix was backported to 11.0.4 and later

[DanVanAtta]

https://github.com/triplea-game/triplea/pull/5269 updates installers to install4j8 with 11.0.4 bundled

[DanVanAtta]

@FrostionAAA if you would, could you check if this is fixed with the latest prerelease? The installer is on a new major version and has a different JDK installed with it, with luck all will go smoothly.

[FrostionAAA]

I tested with TripleA 2.0.16005. It seems to work again :-)