Merge pull request #1393 from LLK/greenkeeper/scratch-vm-0.1.0-prerelease.1517513646-prerelease.1517513661

Update scratch-vm to the latest version 

Update sprite, backdrop and extension buttons

Revert "Sprite library now centered"

Use variable type information in variable prompts to show/hide 'more options'

Update scratch-blocks to the latest version 

Monitor should show the list's name

Since we will be adding more interactivity, the active state will
eventually pop the menu open, so I'm not worried about accessibility of
this right now.

Fix feedback iframe scrolling for iOS.

Merge pull request #1382 from LLK/greenkeeper/scratch-vm-0.1.0-prerelease.1517409350-prerelease.1517409368

Update scratch-vm to the latest version 

Update scratch-paint dependency because greenkeeper does not want to

Fix several safari audio issues

Fix input css to apply only to text fields

It claims to support other sample rates, as the spec requires, but it
does not.

Merge pull request #1377 from LLK/greenkeeper/scratch-vm-0.1.0-prerelease.1517344159-prerelease.1517344174

Update scratch-vm to the latest version 

Add telemetry for "hard crash" events

Sprite library now centered

Update scratch-blocks to the latest version 

This is a long standing issue with how iOS deals with scrollable
elements within a fixed area. This was a helpful resource
https://davidwalsh.name/scroll-iframes-ios

Showing/hiding 'more options' in the different types of variable prompts based on var type provided from scratch blocks

Fixing monitor prop type warning for scalar variable monitors.

Update scratch-blocks to the latest version