Move left pane entirely to React

ts/state/actions.ts

@@ -0,0 +1,15 @@
+import { bindActionCreators, Dispatch } from 'redux';
+
+import { actions as search } from './ducks/search';
+import { actions as conversations } from './ducks/conversations';
+import { actions as user } from './ducks/user';
+
+const actions = {
+  ...search,
+  ...conversations,
+  ...user,
+};
+
+export function mapDispatchToProps(dispatch: Dispatch): Object {
+  return bindActionCreators(actions, dispatch);
+}