pidgin/pidgin

Replace purple_roomlist_[gs]et_ui_data with g_object_[gs]et_data

Testing Done:
Verified the room list still works in Pidgin but couldn't test Finch as I couldn't add an account.

Reviewed at https://reviews.imfreedom.org/r/687/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$