[Bugs] #4397 untriaged UNSP: Fix ViewSource layout

[Sugar Labs Bugs]

#4397: Fix ViewSource layout
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    Reporter:  manuq                      |          Owner:                             
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  untriaged                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 - Currently the view can be resized, remove grip.
 - Fix buttons alignment, they have bad spacing, should be left aligned.
 - A long title does not ellipsize, the Stop button can be left outside in
 the drop-down menu
 - Browse, use icon for MIME html for html source
 - Browse, html source displays a vertical line

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4397>
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