pidgin/pidgin

Use G_DECLARE_DERIVABLE_TYPE for PurpleConversation and additional cleanups

2021-04-16, Gary Kramlich
f1b7c03f6cc7
Use G_DECLARE_DERIVABLE_TYPE for PurpleConversation and additional cleanups

The setters for PurpleConversation are kind of crappy because of the
conversation cache in the purple_conversations api, which we'll address at a
later time.

Testing Done:
Compiled and ran locally, parted a chat and just signed out to verify no new issues.

Reviewed at https://reviews.imfreedom.org/r/613/
#tab-label-typing {
color: #4e9a06;
}
#tab-label-typed {
color: #c4a000;
}
#tab-label-attention {
color: #006aff;
}
#tab-label-unreadchat {
color: #cc0000;
}
#tab-label-event {
color: #888a85;
}