Merge pull request #1565 from Budibase/fix/users-table

Fixes issue where earlier imported apps might break because certain fields do not exist

packages/builder/src/components/backend/DataTable/Table.svelte

@@ -45,10 +45,18 @@
           schema[field].editable = false
         }
       })
+      if (schema.email) {
         schema.email.displayName = "Email"
+      }
+      if (schema.roleId) {
         schema.roleId.displayName = "Role"
+      }
+      if (schema.firstName) {
         schema.firstName.displayName = "First Name"
+      }
+      if (schema.lastName) {
         schema.lastName.displayName = "Last Name"
+      }
       if (schema.status) {
         schema.status.displayName = "Status"
       }