pidgin/pidgin

Make the CredentialManager the only thing in charge of its preferences.

Testing Done:
Started pidgin3 with an empty config directory, verified the notify dialog didn't pop up. Set the preference and exited a few times to make sure everything was working properly.

Reviewed at https://reviews.imfreedom.org/r/1079/
subdir('disco')
subdir('gestures')
subdir('xmppconsole')
gtkbuddynote = library('gtkbuddynote', 'gtkbuddynote.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-BuddyNote"'],
dependencies : [libpurple_dep, libpidgin_dep, glib],
name_prefix : '',
install : true, install_dir : PIDGIN_PLUGINDIR)
iconaway = library('iconaway', 'iconaway.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-IconAway"'],
dependencies : [libpurple_dep, libpidgin_dep, glib],
name_prefix : '',
install : true, install_dir : PIDGIN_PLUGINDIR)
notify = library('notify', 'notify.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-Notify"'],
dependencies : [libpurple_dep, libpidgin_dep, glib],
name_prefix : '',
build_by_default: false,
install : false, install_dir : PIDGIN_PLUGINDIR)
relnot = library('relnot', 'relnot.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-RelNot"'],
dependencies : [libpurple_dep, libpidgin_dep, libsoup, glib],
name_prefix : '',
install : true, install_dir : PIDGIN_PLUGINDIR)
spellchk = library('spellchk', 'spellchk.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-SpellCheck"'],
dependencies : [libpurple_dep, libpidgin_dep, glib],
name_prefix : '',
build_by_default: false,
install : false, install_dir : PIDGIN_PLUGINDIR)
if IS_WIN32
transparency = library('transparency', 'transparency.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-Transparency"'],
dependencies : [libpurple_dep, libpidgin_dep, glib],
name_prefix : '',
install : true, install_dir : PIDGIN_PLUGINDIR)
endif
if enable_unity
unity = library('unity', 'unity.c',
c_args : ['-DG_LOG_USE_STRUCTURED', '-DG_LOG_DOMAIN="PidginPlugin-Unity"'],
dependencies : [UNITY, libpurple_dep, libpidgin_dep, glib],
name_prefix : '',
install : true, install_dir : PIDGIN_PLUGINDIR)
endif
devenv.append('PIDGIN_PLUGIN_PATH', meson.current_build_dir())