Weston Ruter 71169d688a Customize: Fix handling of the nav menu item labels (titles) that match defaults (original titles) and fix the display of item type labels.
* Show default labels for nav menu item as placeholders in a control's label field instead of showing blank.
* Store empty string as label instead of copying default labels.
* Prevent labels for post type archive items from being dropped in preview.
* Also ensure that the item type label is displayed on nav menu item controls for settings that are loaded from an existing changeset.

Amends [38618].
See #38015.
Fixes #38955 for 4.7 branch.

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git-svn-id: http://core.svn.wordpress.org/branches/4.7@39335 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-11-30 23:42:32 +00:00
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