Update manuscript source and label columns

src/client/reducers/manuscripts.js

@@ -43,8 +43,8 @@ export const INITIAL_STATE = {
     },
     {
       id: 'prefLabel',
-      label: 'Title',
-      desc: 'Title description',
+      label: 'Label',
+      desc: 'Label description',
       valueType: 'string',
       makeLink: false,
       sortValues: true,

src/server/sparql/SparqlQueriesManuscripts.js

 export const manuscriptProperties = `
   ?id skos:prefLabel ?prefLabel .
   {
-    ?id dct:source ?source__id .
-    ?source__id skos:prefLabel ?source__prefLabel .
-    OPTIONAL { ?id mmm-schema:data_provider_url ?source__dataProviderUrl }
+    ?id mmm-schema:data_provider_url ?source__id .
+    BIND (?source__id AS ?source__prefLabel)
+    BIND (?source__id AS ?source__dataProviderUrl)
   }
   UNION
   {