Forgot about showing message on delete

Using javascript to fadeIn the standard wp update div and give positive
feedback that media items were deleted and in the case of bulk delete,
how many.  Fades out after 5 seconds.
Just realized that selected popup doesn't go away

Now everything gets unchecked!
Cleaned up Ajax calls

Placed ajax calls for deleting items into it's own function and added
another ajax call function that calls all media items for when the user
checks all and deletes all so they are not left with a blank screen.
This new function will come in handy when I start changing how the input
box works (Media Tags) and for a separate link just to start over.
Link to media grid!!

Can't believe I missed this.  These 2 files were on the wordpress.org
repository and they provide the link to get to media grid.
Merge remote-tracking branch 'origin/media-grid-catch-up'