[Bugs] #3992 sugar URGE: Views: implement long-press behavior

[Sugar Labs Bugs]

#3992: Views: implement long-press behavior
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    Reporter:  erikos  |          Owner:  erikos  
        Type:  task    |         Status:  new     
    Priority:  Urgent  |      Milestone:  0.98    
   Component:  sugar   |        Version:  0.97.x  
    Severity:  Major   |       Keywords:          
Distribution:  OLPC    |   Status_field:  Assigned
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Comment(by erikos):

 While testing I found out that on long press the Palette pops up and
 directly down again. This is because we do use a Gtk.Menu in the Views
 Palette and that does popdown on a long press and actually as well a long
 click (you can test this with a long click with the buttons as well).

 The above patch tries to use our custom Palette for the AP icon. An issue
 with that approach is that currently you can not dismiss such a Palette by
 clicking somewhere around it. As well it does not automatically go away
 when a menu item is selected (see as well the 'remove' option for a usb
 key device in the Frame).

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3992#comment:3>
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