Cannot build XMage with OpenJDK 11+

```
mvn install
```

The only problem I find is that the project does not detect I have OpenJFX installed.
The only problematic class is [mage.client.dialog.WhatsNewDialog](https://github.com/magefree/mage/blob/master/Mage.Client/src/main/java/mage/client/dialog/WhatsNewDialog.java)...

I have also tried building it with Oracle's Java 8, but the project does not recognize it includes JavaFX 8...

Relevant to #6197

Start by running `mvn install` with OpenJDK 11+ and inspect how the build handles the JavaFX dependency used by mage.client.dialog.WhatsNewDialog. Compare that behavior with Oracle Java 8 and the context in issue #6197; done means XMage builds successfully with the reported Java versions and recognizes the available JavaFX installation.

Written by the indexing model from the issue text.