Log Message:
mate-screensaver: update to 1.26.1

Change log:

### mate-screensaver 1.26.1

  * Translations update
  * gs-theme-manager: reload on menu_tree changed
  * Prompt-driven auth. helper

### mate-screensaver 1.26.0

  * Translations update
  * Allow change of time and date formats on lock screen v4
  * update copyright to 2021
  * xdg-user-dir-lookup: missing include guard
  * i18n: Do not collect the translation for Icon (data folder)
  * i18n: Do not collect the translation for Icon
  * i18n: Do not prepend 'GNU ' prefix to the package name
  * Removed translation for icon file name
  * mate-screensaver.directory.desktop: The Encoding key is deprecated
  * Remove warning -Wshadow
  * lock-dialog-default: fix deprecations reported by glade
  * Add Show/Hide password emblem in password entry
  * mate-screensaver-preferences: Show lock image preview on file chooser

### mate-screensaver 1.25.0

  * Translations update
  * add git.mk to generate .gitignore
  * Fix invalid gnome-logo-white.svg
  * build: silent build warnings for distcheck
  * gs-lock-plug: remove function casting
  * Remove function casting for g_idle_add (function, data)
  * build: do not override the default value for MATE_COMPILE_WARNINGS
  * Custom background image for lock screen
  * Remove warnings: cast between incompatible function types
  * Remove warning function declaration isn���t a prototype
  * gs-window-x11: Remove warning "variable ���widget��� set \ 
but not used"
  * floaters: use fabs instead of abs for doubles