[Bugs] #3789 Paint UNSP: Pre-designed forms have three colors when using alpha property

[Sugar Labs Bugs]

#3789: Pre-designed forms have three colors when using alpha property
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    Reporter:  humitos                    |          Owner:  godiard                    
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Paint                      |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:  gtk3, screenshot           
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 Steps to reproduce it:

  1. Open Paint (cairo + gtk3 version)
  1. Set a big border size
  1. Set alpha
  1. Draw a pre-designed form, a circle for example

 Issue:

 The circle drawn has three colors in the same tone

 Expected behaviour:

 The circle should have only two colors, both with alpha

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3789>
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