Fix autostart toggle bug, consolidated some functions

Fixed toggling autostart which was broken last commit.

Consolidated some functions which were only called from one place and
  honestly work more elegantly when merged together.

pinger.py

@@ -99,6 +99,7 @@ else:
 class Pinger:
   ping_log = []
   paused = False
+  autostart = False
 
   def ping(self, widget=None, data=None):
     if not self.paused:
@@ -139,7 +140,8 @@ class Pinger:
     print "Quitting..."
     Gtk.main_quit()
 
-  def create_autostart(self, widget, data=None):
+  def toggle_autostart(self, widget, data=None):
+    if not self.autostart:
       if not os.path.exists(startup_dir):
         os.makedirs(startup_dir)
       with open(startup_path,'w') as f:
@@ -149,30 +151,19 @@ class Pinger:
                 "X-GNOME-Autostart-enabled=true\r\n"
                 "Name=Pinger\r\n"
                 "Comment=Pings the internet every few seconds")
-    self.update_startup_menu()
-
-  def remove_autostart(self, widget, data=None):
+      self.autostart = True
+      self.startup_menu.set_label(startup_active_label)
+    else:
       os.remove(startup_path)
-    self.update_startup_menu()
-    print "Removed"
+      self.autostart = False
+      self.startup_menu.set_label(startup_inactive_label)
 
   def toggle_pause(self, widget, data=None):
     if self.paused:
       self.paused = False
-    else:
-      self.paused = True
-    self.update_pause_menu() 
-
-  def update_startup_menu(self):
-    if os.path.exists(startup_path):
-      self.startup_menu.set_label(startup_active_label)
-    else:
-      self.startup_menu.set_label(startup_inactive_label)
-
-  def update_pause_menu(self):
-    if self.paused:
       self.pause_menu.set_label(play_label)
     else:
+      self.paused = True
       self.pause_menu.set_label(pause_label)
 
   def update_log_menu(self):
@@ -210,10 +201,14 @@ class Pinger:
     self.menu = Gtk.Menu()
     # with pause option
     self.pause_menu = self.create_menu_item(pause_label, self.toggle_pause)
-    self.update_pause_menu()
     # with autostart option
-    self.startup_menu = self.create_menu_item(startup_inactive_label, self.create_autostart)
-    self.update_startup_menu()
+    # first, check current autostart state by checking existance of .desktop file
+    try:
+      with open(startup_dir):
+        self.autostart = True
+    except IOError:
+      self.autostart = False
+    self.startup_menu = self.create_menu_item(startup_inactive_label, self.toggle_autostart)
     # and log display
     self.log_menu = self.create_menu_item("Ping Log", None)
     # and exit option