* Updates to preview modal for release

* Design tweaks and remove import modal

* Resolve issues with tests

* Copy edits HT Eric

* Resolve lint issue with integration test

* One more change to the disclaimer language

* Add line break

Push to history when the library mounts. Whenever popstate occurs after mounting, request to be closed.

Behavior captured in the `Modal` container. If we want to re-use this functionality for anything else that uses `ModalComponent`, just use the `Modal` container rather than `ModalComponent`.

This prevents the fullscreen modal from being scrollable by removing extra height from the library

This way you can click anywhere to gain focus

Concatenate all the tags plus the library item name into one string and search for a match within that. This allows queries to partially match tags and library item names.

The `\n` delimiter is because my first choices of `' '` or `,` are typeable, and would end up matching everything.

This won't work on a lot of browsers, but temporarily just target modern ones. (Robust solution is possible using classNames and refs)

Thanks @towerofnix!

Including action-menu which was also giving one when the backdrop library opened.
Localize the costume library, I missed it while doing the other libraries.

The initial intl store expected an object with an `intl` key, not the intl object as returned by `injectIntl`.

Also changed GUI proptypes to accept Object as well as String for projectData to avoid warnings.

Update project-loader to look for project id as prop (i.e. from www), and fall back to hash.

- export image and sounds in dist/static/assets
- rename main export (`scratch-gui.js`, not `index.js`)
- move project-loader-hoc back to lib (VM doesn’t load properly without it)

Don’t translate IE error modal, if there are errors during the `connect` process the `IntlProvider` doesn’t get set up and the error modal can’t be shown.

Allow intl to be passed in to GUI as a prop (rather than having to be already in the store)

Thanks @ericrosenbaum!