* 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
Pass a `stageSize` property down from a centralized `MediaQuery` in the
GUI component, and control the size of the stage and all surrounding
elements based on that value. Note that this is a pure property and is
not stored in the Redux state, since we gain access to the results of
the media query during `render()` and we shouldn't change Redux state
during `render()`.
Some stage-adjacent elements don't yet react correctly to the smallest
stage size.