Move settings visibility to global state

Fixes #95

app/src/components/SettingsDrawer/BooleanSwitch.tsx

@@ -1,5 +1,10 @@
 import * as React from 'react'
-import { InputLabel, Switch, Tooltip, Theme } from '@material-ui/core'
+import {
+  InputLabel,
+  Switch,
+  Theme,
+  Tooltip
+  } from '@material-ui/core'
 import { withStyles } from '@material-ui/styles'
 const sha1 = require('sha1')
 

app/src/components/SettingsDrawer/Settings.tsx

@@ -204,7 +204,7 @@ const mapStateToProps = (state: AppState) => {
   return {
     autoExpandLimit: state.settings.get('autoExpandLimit'),
     topicOrder: state.settings.get('topicOrder'),
-    visible: state.settings.get('visible'),
+    visible: state.globalState.get('settingsVisible'),
     highlightTopicUpdates: state.settings.get('highlightTopicUpdates'),
     selectTopicWithMouseOver: state.settings.get('selectTopicWithMouseOver'),
     theme: state.settings.get('theme'),