Update datovka to version 4.23.6 / rev 45 via SR 1161159
    
    https://build.opensuse.org/request/show/1161159
    by user dirkmueller + anag+factory
    - update to 4.23.6:
      * Fixed MIME name detection of ZFO files consiting of a ZIP
        archive and which don't contain a data message nor a delivert info.
      * Fixed crashes of message detail dialogue when invalid ZFO
        content is attempted to be displayed.
      * Fixed some memory-related performance issues reported by
        Coverity.
      * Fixed blocked MEP login loop on newer macOS versions.
      * Fixed sending of ZIP archives in normal (non VoDZ) messages
        by explicitly setting their MIME type.
      * Lowered the limit for maximum attachment count to 50 files.
      * Extended the list of allowed attachment file types.
      * Showing total number of attached files in the send message
        dialogue.
      * Fixed restoration of databases without VoDZ content.
    
      * Fixed tag ordering. Tag sorting is now local