Closes #3222

Show multiple alerts in a stack and allow for custom alert icons.

Moving click handling to alert component from container in order to handle index correctly.  Removed AlertsComponent and added new AlertComponent.

Set lang attribute for screen readers

* added account navigation menu, copied and adapted from www

* fixed css

* support for login menu, registration menu from www

* Dropdown replaced with MenuBarMenu, override www css in menus

* render and style login dropdown via function from www

* moved menu styling from menu itself to menu bar

* refactoring menu components and containers

* refactor and restyle account nav menu

* cleaned up cruft and css per rschamp's review of PR 3070

Localize library tags

Testing a new gui component for alerts

Remove duplicate deps

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

Update scratch-l10n to the latest version 

Update chromedriver to the latest version 

Update scratch-blocks to the latest version 

Remove ‘he’ from the languages to ignore

Use new APIs for renderer and canvas

Merge Smoke to Develop