I needed to update the player css because the editor side wasn't large enough to be useable.

I know we will want to change this eventually, so I added comments about that. But the next commit originally contained an inadvertent change to this functionality, so I wanted to add an integration test so that when we do change it, we

It looks like an "test.only" was left in on one of these tests by mistake.

* 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

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

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

Tests adding a list through the UI, the add <thing> blocks, the reported value and adding items using the monitor UI

Resolves https://github.com/LLK/scratch-gui/issues/1713

Fix integration tests for the recent chrome stable update