app manager's view update

app/models/desktop/desktop_widget.rb

@@ -8,8 +8,8 @@ class DesktopWidget
   	field :shape
     field :fullsize, :type => Boolean, default: false
   	field :version, :type => String
-    field :text_color, :type => String, default: "#fff"
-    field :bg_color, :type => String, default: "#fff"
+    field :text_color, :type => String, default: ""
+    field :bg_color, :type => String, default: ""
     field :icon, default: "icon.png"
 
   has_one :css_default, as: :css, :autosave => true, :dependent => :destroy