Expand on the backdrop integration test to make sure this is documented/tested behavior

* Add test for Scratch Link unavailable error modal

* update vm

I forgot that the integration test needs to try clicking, because finding text will find invisible text as well

* Add a space after ‘apple’ in the join block

* Fix integration test

* 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

styling for title field; correct input target in tests; make download filename safer with default, max length; in playground index, correctly pass props through to gui container

HT @paulkaplan

Fixes integration test which was failing trying to use the context menu

It's failing in CI for reasons we don't yet understand