Editor Release: 2 — Boundless Steam update #667909

New Features: * Add button on the base noise nodes to re-seed the individual noise node. * Add world seed to editor. Seed is any string value and affects every aspect of generation. Fixes: * Fix some bad cases in blending of 3d biome features. * Fix regression in 3d visualisations causing old meshes to not be removed on re-mesh. This was a serious performance killer. * Add checks that non-stackable block types like LONG_GRASS or FLOWERS are not used in substrate/strata/instances/ores. Remove these block types from the relevant drop-down lists. * Fix some inconsistencies in PRNG usage leading to non-deterministic output. * Ensure generator produces exact same output across all OS/system library versions... we hope. Let us know if we're wrong! * Fix elliptical ore vein nodes not having their state applied on load (Caused them to have their name / collapsed states reset, and to be centred o...