Log Message:
mate-control-center: update to 1.26.1

Change log:

### mate-control-center 1.26.1

  * Translations update
  * keybindings: fix memory leak
  * keyboard: fix memory leak
  * bookmark-agent: fix backward compatibility with glib < 2.66
  * appearance-style: fix memory leak
  * common: fix memory leak detected by scan-build
  * g_queue_clear_full() is only available since glib 2.60.
  * common: fix memory leak
  * appearance: fix memory leak
  * mate-da-capplet: fix memory leak
  * keyboard: fix memory leak
  * mouse: fix memory leak
  * Change capplets/about-me/mate-about-me-password.c
  * Remove redundant i18n functions
  * Maintain compatibility with Glibc versions older than 2.66