* Don't show intro modal if hideIntro passed to PreviewModal

* Add hideIntro prop to GUI

* Move intro modal hiding logic into its own function

Restore deleted sprite.

Add device connection steps for Lego WeDo 2.0

Update scratch-paint to the latest version 

Update scratch-blocks to the latest version 

Revert "build dist, even when run without NODE_ENV=production"

Update postcss-loader to the latest version 

Update scratch-paint to the latest version 

chore(package): update style-loader to version 0.22.1

Update scratch-blocks to the latest version 

Update postcss-import to the latest version 

Always use sans-serif

bump render and vm together

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

Closes #2797

Closes #2808

Handle RTL for the Modal Component (and things that used the modal component)

Fixes #2756

The ‘back/retry’ button in the connection modal should be reversed, but the others (bluetooth icon, question mark) probably shouldn’t.

build dist, even when run without NODE_ENV=production

Add from backpack to sprite/stage tiles

* center the title on full screen modals.
Adding the `[dir=“ltr”]` atttribute to the css rule for a child style didn’t work the way I expected.
`[dir="ltr"] .full-screen .header-item-title` did not match the fullscreen title element, so the style wasn’t applied.
`.full-screen [dir="ltr"] .header-item-title` did match.
* fix the filter to reverse the icon and ‘x’ in the filter input
* more space after the library back icon
* reverse the arrow on camera -retake image and rerecord sound.

Fixes #2756 Libraries and many other modals share the Modal Component.

Connected the Modal container to redux to make it aware of the RTL state, and then made sure that all places that use the modal component import the container, not the component directly.