[wp-trac] [WordPress Trac] #27878: Custom Menu widget can't be previewed without changing a field

[WordPress Trac]

#27878: Custom Menu widget can't be previewed without changing a field
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 Reporter:  kucrut        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Widgets       |    Version:  3.9
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Steps to reproduce
 1. Go to Appearance > Themes
 2. Click on the Customize button of the Twenty Fourteen theme
 3. Expand any widget area (let's use "Widgets: Primary Sidebar")
 4. Click on Add Widget button
 5. Select "Custom Menu" widget
 6. The widget is not added to the widget area

 I believe adding "--Select--" as the first option on the Menus dropdown
 should solve this, because the user will be 'forced' to make an
 interaction to the widget form.

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Ticket URL: <https://core.trac.wordpress.org/ticket/27878>
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