Add aditional informative text snippet

src/src/Nav.js

@@ -35,7 +35,8 @@ export const Navigation = (props) => {
   const open_B = Boolean(anchorEl_B);
   const open_S = Boolean(anchorEl_S);
   var dialogMetadataTitle = 'Metadata Bulk Uploading Temporarily Unavailable';
-  var dialogMetadataMessage = "<strong>Please prepare any new data submissions using the new next-generation metadata and directory schemas</strong>, which are linked from <a href=\""+exampleLink+"\"  target=\"_blank\">this page</a>. The schemas you should use are marked <strong>\"use this one\"</strong> on the schema pages. You can validate <strong>next-gen metadata schemas</strong> using the <a href=\"https://docs.google.com/document/d/1lfgiDGbyO4K4Hz1FMsJjmJd9RdwjShtJqFYNwKpbcZY/edit#heading=h.d6xf2xeysl78\" target=\"_blank\">process outlined here</a>. <strong>Please also <a href=\"https://docs.google.com/spreadsheets/d/19ZJx_EVyBGKNeW0xxQlOsMdt1DVNZYWmuG014rXsQP4/edit#gid=0\" target=\"_blank\">update this data pulse check spreadsheet</a></strong> so we know what data is coming from your team. We\'re looking forward to your submissions!<br/> \
+  var dialogMetadataMessage = "Upload of Sample metadata is currently disabled. Please submit your metadata files to the help desk at <a href=\"mailto:help@hubmapconsortium.org\">help@hubmapconsortium.org</a>. <hr/>\
+  <strong>Please prepare any new data submissions using the new next-generation metadata and directory schemas</strong>, which are linked from <a href=\""+exampleLink+"\"  target=\"_blank\">this page</a>. The schemas you should use are marked <strong>\"use this one\"</strong> on the schema pages. You can validate <strong>next-gen metadata schemas</strong> using the <a href=\"https://docs.google.com/document/d/1lfgiDGbyO4K4Hz1FMsJjmJd9RdwjShtJqFYNwKpbcZY/edit#heading=h.d6xf2xeysl78\" target=\"_blank\">process outlined here</a>. <strong>Please also <a href=\"https://docs.google.com/spreadsheets/d/19ZJx_EVyBGKNeW0xxQlOsMdt1DVNZYWmuG014rXsQP4/edit#gid=0\" target=\"_blank\">update this data pulse check spreadsheet</a></strong> so we know what data is coming from your team. We\'re looking forward to your submissions!<br/> \
   Please contact <a href=\"mailto:help@hubmapconsortium.org\">help@hubmapconsortium.org</a> if you have questions.";
   const location = useLocation();
   let navigate = useNavigate();

src/src/components/ui/dialog.jsx

@@ -39,7 +39,6 @@ export default function MUIDialog(props) {
         </IconButton>
         <DialogContent dividers>
           <Typography dangerouslySetInnerHTML={{ __html:props.message }}>
-
           </Typography>
         </DialogContent>
         <DialogActions>