Also added jsdoc to locale-utils

* Handle recordSoundCallback from blocks

* Set custom field type for sounds menu

* Add record… item to sounds menu

* Use localized string and ID for ‘record…’ option

* Add integration test

* Don’t use custom field for sounds menu

* Use callback as the value of the ‘record…’ menu item

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

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

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