[Bugs] #4155 Read NORM: Multiple bookmark dialogues

[Sugar Labs Bugs]

#4155: Multiple bookmark dialogues
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    Reporter:  humitos      |          Owner:  godiard                    
        Type:  defect       |         Status:  new                        
    Priority:  Normal       |      Milestone:  Unspecified by Release Team
   Component:  Read         |        Version:  Unspecified                
    Severity:  Unspecified  |       Keywords:                             
Distribution:  Unspecified  |   Status_field:  Unconfirmed                
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 Steps to reproduce it:

  1. Open Read
  1. Create a bookmark
  1. Click 'many' times on the bookmark icon shown in the top right corner.

 Issue:

 The bookmark dialogue is shown 'many' times each over the other and I have
 to click 'many' times on 'X' or 'Tick' to close all of them.

 Expected behaviour:

 Do not open a 'new' dialogue window.

 Environment:

 Read from git sugar-build F17

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4155>
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