This will enable porting things to binding/expression lookup.
I probably didn't _really_ need to make everything properties, but that was easier to do than figure out which ones would really be needed.
Testing Done:
Ran discovery on `pidgin.im`; saw `conference.pidgin.im` show up, then expanded it and the various rooms appeared, as they should. Clicked Add on a few and verified that the Add Chat dialog appeared with the correct values.
Reviewed at https://reviews.imfreedom.org/r/2210/
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the PACKAGE package.
#
# Translators:
# Aleksandar Urosevic <urke@users.sourceforge.net>, 2003-2004
# Danilo Segan <dsegan@gmx.net>, 2003-2005
# Filip Miletic <f.miletic@ewi.tudelft.nl>, 2004
# Miloš Popović <gpopac@gmail.com>, 2007-2009
# Nikola Kotur <kotnik@ns-linux.org>, 2006
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"Project-Id-Version: Pidgin\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2022-10-26 01:46-0500\n"
"PO-Revision-Date: 2017-09-19 19:26+0000\n"
"Last-Translator: Richard Laager <rlaager@wiktel.com>\n"
"Language-Team: Serbian (Latin) (http://www.transifex.com/pidgin/pidgin/"