Add pane resizing

Refactor styles
Update autoExpand with filtered result count
Add redux batch reducer

app/src/index.tsx

@@ -3,6 +3,7 @@ import './tracking'
 import * as React from 'react'
 import * as ReactDOM from 'react-dom'
 import reduxThunk from 'redux-thunk'
+import { batchDispatchMiddleware } from 'redux-batched-actions';
 
 import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles'
 import reducers from './reducers'
@@ -17,6 +18,7 @@ const store = createStore(
   composeEnhancers(
     applyMiddleware(
       reduxThunk,
+      batchDispatchMiddleware,
     ),
   ),
 )