User can load new project in 3.0

Update monitor labels on the stage when language changes

A complete rewrite of OpcodeLabels. Instead of function, it’s a class that maintains a current translator function, and updates the opcode labelFn for each opcode when a new translator function is set. Add function `getLabel` to return the object with `category` and `labelFn` based on the opcode.

Set intl.formatMessage as the translator function in MonitorList. It has access to the intl object, and wraps all monitors.

stripped title handling from sb file uploader
updated more projectState related names
simplified hash-parser-hoc logic slightly

chore(package): update scratch-paint to version 0.2.0-prerelease.2018…

Update scratch-vm to the latest version 

Update scratch-storage to the latest version 

Update react-contextmenu to the latest version 

Update file-loader to the latest version 

Closes #3325

chore(package): update scratch-blocks to version 0.1.0-prerelease.153…

Update scratch-vm to the latest version 

Closes #3312

* Translate "(empty)" and "length {value.length}"
* Use FormattedMessage

changed componentWillReceiveProps to componentDidUpdate in project-fetcher-hoc and project-metadata-hoc