[Bugs] #1428 UNSP: labels should be used with new toolbar design to prevent black items on small screens

[Sugar Labs Bugs]

#1428: labels should be used with new toolbar design to prevent black items on
small screens
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    Reporter:  walter                     |          Owner:  tomeu                      
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar                      |        Version:  Git as of bugdate          
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 If you have a small screen such that toolbar items run off the end, then
 the toolbar items appear as entries in a list... so far so good. But if
 you neglected to assign a label= entry when creating the toolbar, then the
 entry in the list is blank.

 "label= " properly assigns the label, which fixes the problem, but I
 suspect that many activity developers are not using it since the label
 never appears except in this corner case.

             help_toolbar_button = ToolbarButton(
                     label=_("Help"),
                     page=help_toolbar,
                     icon_name='help-toolbar')

 See attached figures.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1428>
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