ObservableMedia can manifest ExpressionChangedAfterItHasBeenCheckedError

[ThomasBurleson]

The DemoApp uses a MediaQueryStatus component which internal subscribes to $media:ObservableMedia.
Subsequent value changes intermittently generate the following errors:

ERROR Error: ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'undefined'. Current value: ''lg' = ((min-width: 1280px) and (max-width: 1919px))'.
    at viewDebugError (core.umd.js:8458)
    at expressionChangedAfterItHasBeenCheckedError (core.umd.js:8436)
    at checkBindingNoChanges (core.umd.js:8600)
    at checkNoChangesNodeInline (core.umd.js:12472)
    at checkNoChangesNode (core.umd.js:12446)
    at debugCheckNoChangesNode (core.umd.js:13223)
    at debugCheckRenderNodeFn (core.umd.js:13163)
    at Object.eval [as updateRenderer] (

[ThomasBurleson]

Fixed in Beta.10

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