pidgin/pidgin

Separate the AccountChooser from its model and move options to filters

Create a store for accounts and a filter to only show connected accounts

Update everything to use the new PidginAccountStore and PidginAccountFilterConnected filter

Add a GtkTreeModelFilter for protocols by id

Testing Done:
Compiled and opened most of the dialogs to make sure they're still working the same. Was unable to test gevolution.

Reviewed at https://reviews.imfreedom.org/r/95/
[Desktop Entry]
Name=Pidgin 3
GenericName=Internet Messenger
Comment=Chat over IM. Supports AIM, Google Talk, Jabber/XMPP, and more
Exec=pidgin3 %U
Icon=im.pidgin.Pidgin3
StartupNotify=true
Terminal=false
Type=Application
Categories=Network;InstantMessaging;
MimeType=x-scheme-handler/aim;x-scheme-handler/gg;x-scheme-handler/icq;x-scheme-handler/irc;x-scheme-handler/msnim;x-scheme-handler/sip;x-scheme-handler/xmpp;x-scheme-handler/ymsgr
@USES_MM_CHAT_SECTION@