- Update version to 1.26.0
* Update translations
* Update copyright to 2021
* Follow freedesktop guidelines to disable autorun using Hidden key
* Capplet: use a function to set the visibility of treeview rows
* Look for the location of the locking screen app using user's PATH
* Capplet: memory leak
* Fix building Serbian translation
* mate-session-check-accelerated-common: missing include guard
* Capplet: i18n parameter_string argument of gtk_init_with_args
* Build: allow users to disable gettext support (--disable-nls)
* Build: set GETTEXT_PACKAGE=AC_PACKAGE_NAME
* Support xscreensaver when mate-screensaver is not available
* Remove warning -Wshadow
* Remove USE_MATE2_MACROS from autogen.sh (legacy)