improv(GUI): Server icon preview.Buttons to reset, revert clientside mods, copy directories and inspect modpackdirectory

Try with `org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError` and `org.gradle.configureondemand=true`

refactor: Build for armv7 again thanks to @djmaze and their dind-image-with-armhf available at https://github.com/djmaze/dind-image-with-armhf. Store and read version more efficiently by writing it to the manifest.