This plugin hides the extratitle thing and the menu-bar in pidgins conversation windows.
Install pre-requisite pidgin-devel and libpurple-devel packages. On Ubuntu:
sudo apt-get build-dep pidgin
sudo apt-get install pidgin-dev libpurple-dev
Compiling the plugin
make
Installing the plugin to ~/.purple/plugins/
make install
Enable plugin Minimal Conversation from Pidgin plugins list.
i based this plugin on pidgin-leftify-tabs-plugin by nablaa.