[Bugs] #4384 Browse UNSP: Browse: display a message while downloading a PDF

[Sugar Labs Bugs]

#4384: Browse: display a message while downloading a PDF
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    Reporter:  manuq                      |          Owner:  manuq      
        Type:  enhancement                |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  1.0        
   Component:  Browse                     |        Version:  Unspecified
    Severity:  Unspecified                |       Keywords:             
Distribution:  Unspecified                |   Status_field:  Unconfirmed
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 Currently it displays a blank page while the PDF is downloading.  Instead,
 display a message with the same style as others in Sugar, like in the
 Journal and the "no matches" in the Home activities list view.

 As a plus, the icon can be animated to display the download progress.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4384>
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