[widgets] Toolchain class renaming and improvement

4 jobs for 251_toolchain_scene_refactoring in 15 minutes and 28 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #190646
docker
build_linux_36

00:06:15

passed #190647
docker
build_linux_37

00:06:06

passed #190644
macosx
build_macosx_36

00:15:28

passed #190645
macosx
build_macosx_37

00:15:05