Log Message:
mate-indicator-applet: update to 1.21.0

Change log:

  * Translations update
  * tomboykeybinder: avoid 'gdk_error_trap_push/pop' and 'gdk_flush'
  * migrate language list to po/LINGUAS file
  * disable deprecation warnings for distcheck
  * tomboykeybinder: avoid deprecated 'gdk_keymap_get_default'
  * transifex: update config with branch specific resoures