[Bugs] #4272 untriaged NORM: Help Palettes for touch usage

[Sugar Labs Bugs]

#4272: Help Palettes for touch usage
----------------------------+-----------------------------------------------
    Reporter:  erikos       |          Owner:  erikos     
        Type:  defect       |         Status:  new        
    Priority:  Normal       |      Milestone:  0.98       
   Component:  untriaged    |        Version:  Unspecified
    Severity:  Minor        |       Keywords:             
Distribution:  Unspecified  |   Status_field:  Unconfirmed
----------------------------+-----------------------------------------------
 The help Palettes should be toggle Palettes (tapping on the icon will
 show/hide Palette depending on the current state).

 Furthermore the Palette should allow scrolling with touch. In GTK2 (e.g.
 TA we will not be able to make that change) but in the GTK3 case this will
 be possible if we either lock the Palette or do get it working properly
 for the leave/enter events.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4272>
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