Adapt redux

Add hover-effect on nodes
Add Setting drawer
Ass auto expansion setting

app/src/actions/Settings.ts

@@ -0,0 +1,15 @@
+import { Action } from 'redux'
+import { ActionTypes } from '../reducers'
+
+export const setAutoExpandLimit = (autoExpandLimit: number = 0) => {
+  return {
+    autoExpandLimit,
+    type: ActionTypes.setAutoExpandLimit,
+  }
+}
+
+export const toggleSettingsVisibility = () => {
+  return {
+    type: ActionTypes.toggleSettingsVisibility,
+  }
+}