pidgin/pidgin

rename conversation.[ch] to purpleconversation.[ch] and split PurpleConversationUiOps out to its own file to avoid circular include issues.

2021-04-12, Gary Kramlich
d3518ff99fa7
rename conversation.[ch] to purpleconversation.[ch] and split PurpleConversationUiOps out to its own file to avoid circular include issues.

Testing Done:
Compiled and ran locally including docs and pot file. The pot file fails as I need to rebase on [596](https://reviews.imfreedom.org/r/596/)

Reviewed at https://reviews.imfreedom.org/r/597/
[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/gg;x-scheme-handler/irc;x-scheme-handler/sip;x-scheme-handler/xmpp;
@USES_MM_CHAT_SECTION@