pidgin/pidgin

Merged in default (pull request #665)

2019-12-30, Gary Kramlich
8066acc5ed93
Merged in default (pull request #665)

Convert most Xfer UI ops to signals

Approved-by: Gary Kramlich
For information on translating Pidgin, libpurple, and Finch, please see
our wiki page at https://developer.pidgin.im/wiki/TipsForTranslators