and other small sprite and costume library updates

* Add mic indicator

* Fix mic indicator position and margin

* Don’t always show indicator, don’t sneaky-enable extension

* Position mic indicator in RTL

* Actually, don’t move indicator in RTL

* Update event name for MIC_LISTENING

* Move mic indicator state into redux

* Move stageSizeToTransform into screen-utils

* Position mic indicator and question at bottom of stage

* Fix pointer events

* JSDOC for stageSizeToTransform

* Pass micIndicator into StageComponent via …props

* added account navigation menu, copied and adapted from www

* fixed css

* support for login menu, registration menu from www

* Dropdown replaced with MenuBarMenu, override www css in menus

* render and style login dropdown via function from www

* moved menu styling from menu itself to menu bar

* refactoring menu components and containers

* refactor and restyle account nav menu

* cleaned up cruft and css per rschamp's review of PR 3070

* convert all tags to have a `tag` field corresponding to the query parameter, and `intlLabel` field that defines the title message for `FormattedMessage`
* define all the tag messages in a shared file so they can be included in multiple places.
* convert the `TagButton` to use `tag` for the `onclick` handler value, and localize `intlLabel` for the title.

In the library I’ve continued to use `tag.toLowercase()` even though all the tags are currently defined as lowercase. It’s safer, but currently not strictly needed.

Questions:
* should the message strings include the number? Or should that get added to the name when the name is defined
* added a new ‘shared-messages’ to handle the definition of backdrop, costume, etc which are used in multiple places, they’re all related to defaults, so should it all be in `lib/default-project`

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 @chrisgarrity

If the VM is ever instantiated, which happens whenever GUI is instantiated due to default props, then IE11 will crash

Just use ProjectLoaderHOC to translate props to redux. Trying to be clever about using both props and redux state together was... not clever.

Resolves #3040

Fastly is not configured yet

- empty MapDispatchToProps (dispatch)
- remove `on…` VM listeners from props passed to wrapped component.

We don't have revisions

*Kind of*. This isn't a good way to do it because we use the storage singleton before GUI is mounted. This needs to happen differently, like configuring storage in the project loader hoc and passing it down, so it could be attached to the VM once it has a VM?

Fixup 723d975d062ce3b585715b5cbabfcdae218d901a

This reverts commit 723d975d062ce3b585715b5cbabfcdae218d901a.