pidgin/pidgin

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/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?