[Bugs] #4172 sugar-artwork UNSP: Set color of insensitive buttons

[Sugar Labs Bugs]

#4172: Set color of insensitive buttons
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    Reporter:  manuq                      |          Owner:  manuq      
        Type:  defect                     |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  0.98       
   Component:  sugar-artwork              |        Version:  Unspecified
    Severity:  Unspecified                |       Keywords:  r?         
Distribution:  Unspecified                |   Status_field:  Unconfirmed
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Comment(by manuq):

 Added v2 that takes into account Gary's considerations in #4177 .  It
 seems that setting the background of insensitive buttons to transparent
 works for all cases.

 TestCases:

 Test in white canvas, like in the intro screen:

 - run tests/graphics/intro.py
 - go to previus and delete the nick name
 - see the inactive button
 - to close the test you can use xkill command

 Test in a normal activity canvas, with panel_grey background:

 - run tests/graphics/buttons.py with the toolkit patch attached in this
 ticket applied
 - see the inactive button

 Test in black canvas, like in the wireless password dialog:

 - run [http://bugs.sugarlabs.org/attachment/ticket/3971/testdialog.py
 testdialog.py]
 - click on the button, dialog appears
 - see the inactive button

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4172#comment:2>
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