[Bug 55608] The elimination history function is invalid

[bstqc_ostl]

Public bug reported:

1.System->Administrator->network tools->ping; 
2.In display result, click "edit->clear history",it does not clear history. 
 Whois、finger、netstat、lookup、and port scan have the same problem.www

** Affects: gnome-nettool (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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The elimination history function is invalid 
https://launchpad.net/bugs/55608