Base dark theme implementation

redux/user/user.actions.js

@@ -98,3 +98,7 @@ export const validatePasswordResetFailure = (error) => ({
   type: UserActionTypes.VALIDATE_PASSWORD_RESET_FAILURE,
   payload: error,
 });
+export const setTheme = (theme) => ({
+  type: UserActionTypes.SET_THEME,
+  payload: theme,
+});