Log Message:
caja-dropbox: update to 1.26.0

Change log:

### caja-dropbox 1.26.0

  * update translations

### caja-dropbox 1.25.0

  * update translations
  * update copyright for 2021
  * dropbox-client-util: add missing include
  * caja-dropbox: reset_all_files is a static function
  * caja-dropbox.pot: use UTF-8 charset
  * Add i18n support
  * Remove USE_MATE2_MACROS from autogen.sh (legacy)
  * build: silent build warnings for distcheck
  * build: Silent building
  * use MATE_COMPILE_WARNINGS from mate-common