Debounce saveState call

Closes RocketChat#181

Author: rodrigok

package.json

@@ -57,6 +57,7 @@
     "electron-notification-shim": "^1.1.0",
     "electron-toaster": "^2.0.2",
     "spellchecker": "3.3.1",
+    "lodash": "^4.17.4",
     "electron-rebuild": "1.5.6"
   },
   "devDependencies": {

src/background/windowState.js

@@ -4,6 +4,7 @@
 
 import { app } from 'electron';
 import jetpack from 'fs-jetpack';
+import _ from 'lodash';
 
 export default function (name, defaults) {
 
@@ -47,6 +48,6 @@ export default function (name, defaults) {
         get isMaximized () { return state.isMaximized; },
         get isMinimized () { return state.isMinimized; },
         get isHidden () { return state.isHidden; },
-        saveState: saveState
+        saveState: _.debounce(saveState, 1000)
     };
 }