Blurred UI text on Ubuntu 16.04

[fblampe]

Swing UI text looks much more blurry when running programs via the packr wrapper than when using java -jar.
It's not terrible, but when you're used to the unblurred text, the blurred text looks less good.
The kerning also doesn't match.

This is very similar to #39, but since this is about Ubuntu, not MacOS, it likely requires a different approach.

Running with java -jar (fine):

Running with native executable generated by packr (blurry):

[fblampe]

Okay, seems like this is caused by the Zulu JREs, because it also happens when starting the app directly via the bundled java executable, skipping the packr wrapper.

The "java -jar" I mentioned in the first post refers to my system JRE, which is an OpenJDK.