[Bugs] #4782 Sugar HIGH: Pippy does not load example if no tabs present

[Sugar Labs Bugs]

#4782: Pippy does not load example if no tabs present
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       Reporter:  tch          |       Owner:
           Type:  defect       |      Status:  new
       Priority:  High         |   Milestone:  Unspecified
      Component:  Sugar        |     Version:  Unspecified
       Severity:  Unspecified  |    Keywords:  AU
Distribution/OS:  Unspecified  |  Bug Status:  Unconfirmed
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 Steps:

 1. Use pippy version 58
 2. open pippy.
 3. close all tabs.
 4. open an example (any)
 5. nothing will happen and is confusing, the log shows an ugly error.
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Ticket URL: <http://bugs.sugarlabs.org/ticket/4782>
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