pidgin/pidgin

The vbox is already packed into PidginConversationWindow from glade, don't add it again.

2020-11-24, Gary Kramlich
bbb0be094c2b
The vbox is already packed into PidginConversationWindow from glade, don't add it again.

Testing Done:
Compiled and ran locally, verified the `g_warning` message disappeared.

Reviewed at https://reviews.imfreedom.org/r/252/
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