fix: OIDC finalization and refactoring

client/src/selectors/root.js

@@ -0,0 +1,11 @@
+export const selectIsInitializing = ({ root: { isInitializing } }) => isInitializing;
+
+export const selectConfig = ({ root: { config } }) => config;
+
+export const selectOidcConfig = (state) => selectConfig(state).oidc;
+
+export default {
+  selectIsInitializing,
+  selectConfig,
+  selectOidcConfig,
+};