made alert messages translation-ready
updated project saver hoc
default alerts to COLOR_ORANGE

got tests working

made neutral button color

chore(package): update scratch-vm to version 0.2.0-prerelease.2018110…

Closes #3682

Fix backpack crashing the GUI when trying to store a cloud variable

Fix adding extension blocks from the backpack

Layer extension button and monitors below block drag surface

* Updates to GIFs and HoC content

* lint

Update scratch-storage to the latest version 

Update scratch-svg-renderer to the latest version 

* Override blocks playNote_ to emit VM event

* update blocks

Update scratch-render to the latest version 

Add tests for uploading sprite and costume by file

Allow code to be dragged directly to sprite tiles

Strip nbsp to fix serializing svg on safari

* Add test for Scratch Link unavailable error modal

* update vm

define login dropdown messages, so www component will render with readable text

removed save and save copy from beta; better menu section style handling

Fixes Close button overlap issue

Put stage, monitors, add buttons, tooltips, menubar under the block drag layer. Make sure the Extension button is above the toolbox.

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

Add basic "show more" pagination for the backpack