mate-settings-daemon: update to 1.26.0

Change log:

### mate-settings-daemon 1.26.0

  * update translations
  * update copyright to 2021

### mate-settings-daemon 1.25.1

  * update translations
  * xsettings: Improve Qt HiDPI environment settings
  * xsettings: Set Xft.dpi in X resources to scaled_dpi
  * rfkill: g_memdup is dreprecated from glib 2.68
  * media-keys: memory leak
  * keyboard: Remove warning -Wcast-function-type
  * xsettings: Remove warning -Wcast-function-type
  * background: Remove conversion warnings
  * media-keys: Remove conversion warnings
  * housekeeping: Remove warning -Wcast-function-type
  * housekeeping: override finalize method in MsdHousekeepingManager
  * housekeeping: promote MsdHousekeepingManager class to final type
  * typing-break: promote MsdTypingBreakManager class to final type
  * sound: promote MsdSoundManager class to final type
  * build: set GETTEXT_PACKAGE=AC_PACKAGE_NAME
  * cppcheck warning: struct member is never used
  * background: promote MsdBackgroundManager class to final type
  * mate-settings-daemon: Remove warning -Wcast-function-type
  * mate-settings-daemon: Remove conversion warnings
  * cppcheck warning: Variable is assigned a value that is never used
  * cppcheck warning: known condition is always true
  * cppcheck warning: null pointer redundant check
  * housekeeping: Do not use deprecated gtk_image_new_from_stock
  * Remove warning -Wshadow
  * Use g_slist_free_full
  * msd-background-manager: use g_list_free_full
  * Remove USE_MATE2_MACROS from autogen.sh (legacy)
  * msd-media-keys-manager: 'GTimeVal' is deprecated
  * a11y-keyboard: Add support for togglekeys-backend setting
  * a11y-keyboard: Delay registration of the plugin
  * a11y-keyboard: Add sanity checks on beep sequence preferences
  * a11y-keyboard: Manually beep for togglekeys

### mate-settings-daemon 1.25.0

  * update translations
  * main: Do not override detailed_signal for debugging
  * mate-settings-plugin-info: unused parameter 'settings'
  * add G_GNUC_UNUSED in some unused parameters
  * Add option --without-libatspi and assorted status line
  * a11y-keyboard: Don't show UI for unavailable feature in the pref dialog
  * a11y-keyboard: Don't create a dummy object if AT-SPI is not available
  * a11y-keyboard-atspi: Switch to a final type and reduce boilerplate
  * a11y-keyboard: Depend on the right version of mate-desktop
  * a11y-keyboard: capslock-beep: Try and detect non-buggy libatspi2
  * a11y-keyboard: capslock-beep: Don't ring on CapsLock itself
  * a11y-keyboard: Refactor in the hope the AT-SPI bug gets fixed
  * a11y-keyboard: Add support for ringing the bell when CapsLock is active
  * msd-media-keys-manager: comparison of unsigned expression in '< 0' is always false
  * msd-a11y-keyboard-manager: implicit declaration of function 'd'
  * build: Use MATE_DEBUG_CHECK macro
  * build: Remove unused variable DEBUG_CFLAGS
  * add git.mk to generate .gitignore
  * plugin xsettings: Fix memory leak on delayed_toggle_bg_draw
  * housekeeping: Remove the warning about GTimeVal is deprecated
  * mpris: Use namespace instead of a whitelist for player names
  * build: Using --header and --body at the same time is deprecated
  * build: silent build warnings for distcheck
  * mouse: Remove warnings about absolute value function for long
  * Remove warnings about function declaration isn���t a prototype
  * use MATE_COMPILE_WARNINGS from mate-common
  * housekeeping: Fix iconname of mate-disk-usage-analyzer

(gutteridge)