bug: inconsistent behavior with the `id` prop on react package

when the `id` prop passed into `withSharedState` conflicts with the topline element id prop, the behavior is confusing. Also seems to inconsistently use the prop, like sometimes doesn't work. 
- should show a warning (maybe a linter warning?) if there is a conflict
- should probably have the prop directly passed in to `withSharedState` take precedence over the one that is on the main element