[wp-trac] [WordPress Trac] #43034: Multiple times page is added in menu without warning

[WordPress Trac]

#43034: Multiple times page is added in menu without warning
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 Reporter:  nilamacharya  |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Menus         |    Version:  4.9.1
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Bug: Multiple times page is added in menu without warning

 Attachment for steps: https://www.screencast.com/t/jOBHlmVeUTdO

 Steps:

 1. Navigate to Appearance->Menus from left rail
 2. Select "Menu with Live preview"
 3. Select Menu and click on 'Add Items"
 4. Sect "Pages" and add some page, User can see that "+" icon is changed
 to Tickmark sign, page is added in menu
 5. Again click on same menu , multiple time page is added in menu

 Concern: It should show message over there that "this page is already
 added in menu" because as per Ticket #43033 icons are not updated proper
 so user wil be confuse here and click multiple times

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Ticket URL: <https://core.trac.wordpress.org/ticket/43034>
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