[widgets][experimenteditor] Add tab to visualize the toolchain

Part of #185
4 jobs for 185_toolchain_preview in 11 minutes and 34 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build
passed build_linux_36 #205630
docker

00:11:34

91.0%
passed build_linux_37 #205631
docker

00:11:25

91.0%
passed build_macosx_36 #205628
macosx

00:10:29

91.0%
passed build_macosx_37 #205629
macosx

00:10:07

91.0%