A couple changes here:
- Now only rendering the label on the Chrome window you're immediately blurring... this causes Windows to render the preview properly and is also WAY more efficient.
- Ignoring chrome dev tools... definitely don't want to blot out your page when you're trying to debug it!
- In general, better handling of various potential scenarios.
Now removing the label from whichever window is getting focused.
Now making the label center itself on the page.  Still need to resize it when it doesn't fit, though.