Avoid manual handling of icons in request field list items
* Use `PurpleKeyValuePair` as field list items
* Replace `icons` list with `has_icons` flag, thus fixing memleak
* Replace `purple_request_field_list_get_icons` with `purple_request_field_list_has_icons`
Testing Done:
Compile and run.
Reviewed at https://reviews.imfreedom.org/r/563/
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the PACKAGE package.
#
# Translators:
# Aron Xu <happyaron.xu@gmail.com>, 2009-2011
# fujianwzh <fujianwzh@gmail.com>, 2009
# Funda Wang <fundawang@linux.net.cn>, 2003-2004
# liyuekui <liyuekui@gmail.com>, 2009
msgid""
msgstr""
"Project-Id-Version: Pidgin\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2021-01-12 00:20-0600\n"
"PO-Revision-Date: 2017-09-19 19:26+0000\n"
"Last-Translator: Richard Laager <rlaager@wiktel.com>\n"
"Language-Team: Chinese (China) (http://www.transifex.com/pidgin/pidgin/"