Fix issues with store commit

assets/javascripts/app/auth.coffee

@@ -57,7 +57,10 @@
     localStorage?.setItem('travis.auto_signin', 'true')
     sessionStorage?.setItem('travis.user', JSON.stringify(user))
     @store.load(Travis.User, user)
-    Travis.User.find(user.id)
+    user = @store.find(Travis.User, user.id)
+    transaction = @store.transaction()
+    transaction.add user
+    user
 
   receiveMessage: (event) ->
     if event.origin == @expectedOrigin()

assets/javascripts/app/models/hook.coffee

@@ -23,5 +23,9 @@ require 'travis/model'
   ).property()
 
   toggle: ->
+    transaction = @get('store').transaction()
+    transaction.add this
+
     @set 'active', !@get('active')
-    Travis.app.store.commit()
+
+    transaction.commit()

assets/javascripts/app/models/user.coffee

@@ -14,7 +14,7 @@ require 'travis/model'
 
   init: ->
     @poll() if @get('isSyncing')
-    @._super()
+    @_super()
 
   urlGithub: (->
     "https://github.com/#{@get('login')}"
@@ -22,7 +22,9 @@ require 'travis/model'
 
   updateLocale: (locale) ->
     @setWithSession('locale', locale)
-    Travis.app.store.commit()
+
+    transaction = @get('transaction')
+    transaction.commit()
 
   type: (->
     'user'