0.52.12-1
    
    - fix whiptail --gauge and its description in man page (#620083)
    - remove space after \n in whiptail texts (#620083)
    - remove NLS code from snack (#599608)
    - expose more keys to python as shortcuts in dialogs (Jakob Kemi)
    - release python global-thread-lock during dialog displays (Jakob Kemi)
    - fix warnings in whiptcl.c and include Tcl_PkgProvide() call (Mikhail T.)
    - don't NULL deref when an invalid array is specified in checkboxtree
      (Arnaldo Carvalho de Melo)