The GUI should provide a way to check component versions

[cwillisf]

Expected Behavior

Scratch 2.0 displays a dialog like the following after shift+clicking on the "File" menu then choosing "Show version details":

In the offline editor, the version for scratch-flash-offline is added.

We should offer something similar in scratch-gui. For the sake of alternative wrappers for scratch-gui, such as scratch-desktop, it should also be possible to add additional entries from "outside" of scratch-gui.

Actual Behavior

There is currently no easy and reliable way to determine the version details of scratch-gui and its components.

Things to discuss

• Should the version dialog display the package version, commit hash, both, or something else?
• Should the version dialog include information about every scratch-* repository or just some of them?
• Should the version dialog include information about any non-scratch-* packages?
  • Webpack
  • Electron (for scratch-desktop)
  • others?

[thisandagain]

/cc @rschamp

[rschamp]

Maybe we can bake the package.json into a component at build time?

[cwillisf]

Potentially interesting:

• https://github.com/axelpale/genversion
• https://github.com/headfire94/package-json-cleanup-loader