FIX: Float site settings were marked as overridden, reset didn't work.

app/assets/javascripts/admin/models/site_setting.js

@@ -47,20 +47,15 @@ Discourse.SiteSetting = Discourse.Model.extend({
     return this.get('originalValue') !== this.get('value');
   }.property('originalValue', 'value'),
 
-  /**
-    Has the setting been overridden from its default value?
-
-    @property overridden
-  **/
   overridden: function() {
-    var val = this.get('value');
-    var defaultVal = this.get('default');
+    var val = this.get('value'),
+        defaultVal = this.get('default');
 
     if (val === null) val = '';
     if (defaultVal === null) defaultVal = '';
 
     return val.toString() !== defaultVal.toString();
-  }.property('value'),
+  }.property('value', 'default'),
 
   /**
     Reset the setting to its original value.

lib/site_setting_extension.rb

@@ -131,7 +131,7 @@ module SiteSettingExtension
         opts = {
           setting: s,
           description: description(s),
-          default: v,
+          default: v.to_s,
           type: type.to_s,
           value: value.to_s,
           category: categories[s]
@@ -328,6 +328,8 @@ module SiteSettingExtension
 
   def convert(value, type)
     case type
+    when types[:float]
+      value.to_f
     when types[:fixnum]
       value.to_i
     when types[:string], types[:list], types[:enum]