Fixed linting errors & added Wistia link

Added story activity for upcoming playtet

Update chromedriver to the latest version 

Migrate Videos from YouTube

* Adjust language icon and caret in menu-bar
* remove unused style from `language-selector.css`

Add project loading HOC tests

disable onShare button

Get isRtl from scratch-l10n

Also added jsdoc to locale-utils

This ensures that the reducer is actually called with the project data that storage loaded

Robust URL handling for tutorial and locale

Update scratch-l10n to the latest version 

* 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

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

chore(package): update scratch-vm to version 0.2.0-prerelease.2018101…

User can load new project in 3.0

Closes #3338

Closes #3340

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