[wp-trac] [WordPress Trac] #34350: Update Backbone to 1.2.3 and Underscore to 1.8.3

[WordPress Trac]

#34350: Update Backbone to 1.2.3 and Underscore to 1.8.3
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 Reporter:  caseypatrickdriscoll            |       Owner:  adamsilverstein
     Type:  enhancement                     |      Status:  reopened
 Priority:  normal                          |   Milestone:  4.5
Component:  External Libraries              |     Version:  4.4
 Severity:  normal                          |  Resolution:
 Keywords:  needs-testing has-patch commit  |     Focuses:  javascript
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Comment (by adamsilverstein):

 Replying to [comment:50 imath]:
 > 34350.10.patch is bringing back the buttons and it's possible to bulk
 delete, but the 'Delete Selected' doesn't come back to its initial state
 when the selection is emptied. I hope this "half way" patch will help you
 fix this completely.

 Great. Thanks for catching these.

 In your patch, I don't think you need the third 'context' variable
 (`this`), unless the call you are replacing has the `_.bind( function,
 this )` format the function doesn't need `this` bound and doing so adds
 overhead and could possibly lead to unexpected behavior (if the function
 expected `this` to have a different context).

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Ticket URL: <https://core.trac.wordpress.org/ticket/34350#comment:52>
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