Use process.nextTick instead of MessageChannel

exports/atom.coffee

@@ -1,8 +1,12 @@
 {View, $$, $$$} = require '../src/space-pen-extensions'
 {Document, Point, Range, Site} = require 'telepath'
 
+_ = require 'underscore-plus'
+#TODO Remove once all packages have been updated
+_.nextTick = process.nextTick
+
 module.exports =
-  _: require 'underscore-plus'
+  _: _
   $: require '../src/jquery-extensions'
   $$: $$
   $$$: $$$

src/editor.coffee

@@ -1185,7 +1185,7 @@ class Editor extends View
     return if @pendingDisplayUpdate
     return unless @isVisible()
     @pendingDisplayUpdate = true
-    _.nextTick =>
+    process.nextTick =>
       @updateDisplay()
       @pendingDisplayUpdate = false
 

src/root-view.coffee

@@ -130,7 +130,7 @@ class RootView extends View
       @panes.reopenItem()
 
     if @state.get('fullScreen')
-      _.nextTick => atom.setFullScreen(true)
+      process.nextTick => atom.setFullScreen(true)
 
   # Private:
   serialize: ->

src/window.coffee

@@ -13,7 +13,7 @@ windowEventHandler = null
 # This is done in a next tick to prevent a white flicker from occurring
 # if called synchronously.
 displayWindow = ->
-  _.nextTick ->
+  process.nextTick ->
     atom.show()
     atom.focus()