pidgin/pidgin

Clean up some issues with the desktop files and purple3-url-handler

2021-02-27, Gary Kramlich
4682777df311
Clean up some issues with the desktop files and purple3-url-handler

Testing Done:
Ran meson locally verified files were created and proper-enough.

Reviewed at https://reviews.imfreedom.org/r/532/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in
sub/libpurple/data/purple-url-handler.desktop.in
sub/libpurple/protocols/null/nullprpl.c
sub/pidgin/data/im.pidgin.Pidgin.desktop.in