Remove usage of pidgin_conv_is_hidden from transparency plugin
Review Request #1139 — Created Nov. 23, 2021 and submitted — Latest diff uploaded
This plugin is only used on Windows so that's probably why we didn't notice that it used this function when we deprecated it a few weeks ago.
Compiled on Windows and verified the plugin can be enabled without crashing. Couldn't test it with a conversation since Pidgin3 on Windows crashes for me when I try to add a new account.