BHV-11008: Two panels are showing when transitioning from second to first panel. . .

. . .in always viewing pattern

### Issue:
This is a corner case where the user first initiates a panel transition, then clicks on an input for the soon-to-be-offscreen panel. The text the user types in goes to the offscreen input.
### Fix:
add code in updateSpotability() to blur the active element, if the panel is offscreen and the active element is in the panel.
### Regression notes:
This is listed as a regression, but I'm not sure if it is. It is a corner case.

Enyo-DCO-1.1-Signed-off-by: Krishna Rangarajan <krishna.rangarajan@lge.com>
This can probably just be `activeElement.blur()`, but I noticed something else that was odd. If I set focus on the input field as we are transitioning back to the first panel, and I begin to press keys, we end up with the original issue. I think we may need to blur earlier, maybe when the transition commences.