[Bugs] #3010 UNSP: Turtle Art: Put '-' icon on top icon for collapsible block

[Sugar Labs Bugs]

#3010: Turtle Art: Put '-' icon on top icon for collapsible block
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    Reporter:  Mokurai                    |          Owner:                             
        Type:  enhancement                |         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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 When creating Turtle Art stacks too long for the visible workspace, one
 can frame code segments with two unnamed blocks from the Extras palette,
 allowing the programmer or user to collapse code to a single block. The
 lower block has the '-' icon for collapsing the segment. However, this
 means that the programmer or reader of the program has to scroll down
 frequently just to collapse blocks. Putting a similar '-' icon on the
 upper block will remove this necessity, saving significant time,
 particularly when debugging several long stacks.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3010>
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