chore(package): update scratch-vm to version 0.2.0-prerelease.2019031…

Closes #4662

Refactor extensions library index file

Move project saving to server to helper, allow external save action

Since this is in a promise chain, it doesn't matter if onUpdateProjectData returns a promise or a primitive, it'll work either way

chore(package): update scratch-blocks to version 0.1.0-prerelease.155…

Update scratch-vm to the latest version 

Set static asset path (publicPath) with environment var

Update scratch-vm to the latest version 

Closes #4654

Add telemetry hooks

chore(package): update scratch-vm to version 0.2.0-prerelease.2019031…

Update scratch-blocks to the latest version 

Closes #4650

Allow for both bluetooth and internet connection icons in extensions

Remove most of the GA events

Update scratch-vm to the latest version 

Allows consumers of gui (desktop, android, etc) to rebuild gui with a relative path for static assets. Default is an absolute path as that is what is required for www.

Account for the addition of locale prop expected in mapStateToProps.
Note: if/when the telemetry code gets moved into its own hoc, the prop should get removed, and the test should get updated as well.

Conflicts:
	src/components/library-item/library-item.jsx
	src/components/library/library.jsx
	src/components/menu-bar/menu-bar.jsx
	src/containers/library-item.jsx
	src/lib/project-saver-hoc.jsx