Add a field row component

app/src/frontend/building/data-components/field-row.css

@@ -0,0 +1,11 @@
+.field-row {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-evenly;
+    justify-items: left;
+}
+
+/* make all row elements the same width */
+.field-row * {
+    flex: 1 1 0px;
+}

app/src/frontend/building/data-components/field-row.tsx

@@ -0,0 +1,11 @@
+import React from 'react'
+
+import './field-row.css';
+
+export function FieldRow({children}) {
+    return (
+        <div className="field-row">
+            {children}
+        </div>
+    )
+}