Pidgin Shortcuts / Hotkey / bring buddy list to the front

Search and download Pidgin-Hotkeys
Then enable in plugins

To bring pidgin to the front with a shortcut: ctrl + alt + k

In Ubuntu, it can be install by using sudo apt install pidgin-hotkeys. Then create some links:
ln -s /usr/lib/pidgin/hotkeys.so  ~/.purple/plugins/
ln -s /usr/lib/pidgin/hotkeys.la  ~/.purple/plugins/