#sstBase64Encoded now uses Base64Coder instead of Base64CoderMime
          The method EsString >> sstBase64Encoded was delegating to Base64CoderMime to do the Base 64 encoding. The change is now to delegate to Base64Coder instead. 
          Reason for change
          The method/selector #sstBase64Encoded is too generic to be tight to Base 64 MIME encoding. Such method should be doing instead a regular Base 64 encoding. 
          Action required
          If you really need a Base 64 MIME encoding, then instead of using #sstBase64Encoded, just use Base64CoderMime directly. For example, doing: `Base64CoderMime current encode: 'example'`.
           
         
        
          Last modified date: 12/29/2022