Migration of jsx files to tsx 2 (#850)

This is to continue the work of migrating all the jsx files into tsx
files.
The MO is basically described here: #848.

About 7 files to go...

src/components/_labelFromFieldName.ts

@@ -0,0 +1,13 @@
+import capitalize from 'lodash.capitalize'
+
+export default function labelFromFieldName(fieldName: string) {
+  let label;
+  const parts = fieldName.split('-');
+  if (parts.length > 1) {
+    label = fieldName.split('-').slice(1).join(' ');
+  }
+  else {
+    label = fieldName;
+  }
+  return capitalize(label);
+}