pidgin/pidgin

Rename gtkstyle.[ch] to pidginstyle.[ch] and fix up the dark mode check.

2020-11-10, Gary Kramlich
559881c7bf92
Rename gtkstyle.[ch] to pidginstyle.[ch] and fix up the dark mode check.

Testing Done:
* Ran with arc-dark and adwatia.
* Stepped through the debugger to make sure it was detected right.
* Joined a muc with both themes, the colors change but there're impossible to see as most of that code is elsewhere and not addressed in this review request.
* Also noticed that nicks in mucs are doubled, not sure what, but it's that way with out this patch as well.

Reviewed at https://reviews.imfreedom.org/r/208/
pidginpixmapdir = get_option('datadir') / 'pixmaps/pidgin'
subdir('emotes/default/24')
subdir('emotes/small/16')
if INSTALL_PIXMAPS
install_data('logo.png', 'arrow-down.xpm', 'arrow-left.xpm', 'arrow-right.xpm', 'arrow-up.xpm',
install_dir : pidginpixmapdir)
# Some of these don't use install_subdir because it deletes the target,
# and some target directories probably have something in them, for those
# installing somewhere with existing stuff. Additionally, we have
# extra stuff in our directories we don't want to install.
install_data('edit.png', 'info.png', 'pause.png',
install_dir : pidginpixmapdir / 'buttons')
subdir('tray')
endif