WIP optimize connect with redux state in preferences pages.

client/src/containers/Currencies/withCurrencies.js

@@ -0,0 +1,13 @@
+import { connect } from 'react-redux';
+
+export default (mapState) => {  
+  const mapStateToProps = (state, props) => {
+    const mapped = {
+      currencies: state.currencies.data,
+      currenciesList: Object.values(state.currencies.data),
+    };
+    return mapState ? mapState(mapped, state, props) : mapped;
+  };
+  
+  return connect(mapStateToProps);
+}