Log Message:
mate-desktop: update to 1.26.0

Change log:

### mate-desktop 1.26.0

  * Translations update
  * Replace the obsolete API in mate-colorsel.c file
  * Fix compilation warning
  * update copyright to 2021
  * travis-ci: use ubuntu focal as host system
  * MATE About: Fix off-by-one error, display yerba mate comment
  * travis: disable travis builds for ubuntu
  * Remove shadow warnings [-Wshadow]
  * mate-about: Use the macro _(String) instead of the macro gettext(Msgid)
  * Drop local macro mate_gettext(package, locale, codeset)
  * Remove warning -Wbad-function-cast
  * g_settings_get_string always returns a newly-allocated string
  * build: set GETTEXT_PACKAGE=AC_PACKAGE_NAME
  * tx: update resource
  * mate-color-select: Do not use deprecated gtk_button_new_from_stock
  * update issue template
  * Remove USE_MATE2_MACROS from autogen.sh (legacy)
  * travis CI: use rolling tag for ubuntu docker image
  * travis CI: fix build issue of gtk-doc module

### mate-desktop 1.25.0

  * Translations update
  * mate-languages: portability of localedir fallback
  * a11y-keyboard: Add togglekeys-backend setting
  * a11y-keyboard: Add ranges for togglekeys beep settings
  * a11y-keyboard: Add settings to control beeps used for togglekeys
  * Bump version so other components can depend on it
  * a11y-keyboard: Add capslock-beep-enable gsetting
  * mate-desktop-thumbnail: Remove trailing spaces/tabs
  * add git.mk to generate .gitignore
  * build: silent build warnings for distcheck
  * Set range for thumbnail cache maximum-age
  * build: use MATE_COMPILE_WARNINGS = yes as default
  * meson: add configuration item description
  * mate-bg: remove warning function declaration isn���t a prototype
  * Remove warnings: cast between incompatible function types
  * mate-about.desktop: Do not collect the translation for Icon
  * build: remove mate-version.xml on distclean target instead of clean
  * mate-about: remove unused variable ���window���
  * build: remove mate-about.h on distclean target instead of clean
  * build: add meson config files to EXTRA_DIST
  * Remove GTimeVal deprecation warning for GLib 2.61.2+
  * thumbnail: fix typo in function description
  * Make the build reproducible