* We don't need to shadow in `lombok` itself. Gradle must be upgraded to at least 4.6 to support `annotationProcessor`, which is a version that still supports Java 7.
* `args4j-maven-plugin` is intended to use as a maven plugin.
* The requirement for `jaxb-api` was removed in 81cba7d58c0ce8a334204700dca669f2ad8e16ff
* We are only using `simple-xml`, don't need the whole `retrofit`+`okhttp`+`okio` chain.
* Resolve deprecation warnings in JNA code.
* feature: light/dark mode theme support
New feature providing a more modern flat design with support for light and dark modes, including:
- New SheepIt logo (old one removed)
- New configuration option (-theme) that changes the existing client theme.
- Minimal UI cosmetic changes (some separation lines under the logo and above the buttons)
