Badges admin UI improvements.

* Query param to allow linking.
* Better handling of deleting unsaved badges.
* New badge list item style improvement.

app/assets/javascripts/admin/controllers/admin_badges_controller.js

@@ -8,6 +8,15 @@
 **/
 Discourse.AdminBadgesController = Ember.ArrayController.extend({
   itemController: 'adminBadge',
+  queryParams: ['badgeId'],
+
+  /**
+    ID of the currently selected badge.
+
+    @property badgeId
+    @type {Integer}
+  **/
+  badgeId: Em.computed.alias('selectedItem.id'),
 
   /**
     We don't allow setting a description if a translation for the given badge
@@ -68,6 +77,13 @@ Discourse.AdminBadgesController = Ember.ArrayController.extend({
       @method destroy
     **/
     destroy: function() {
+      // Delete immediately if the selected badge is new.
+      if (!this.get('selectedItem.id')) {
+        this.get('model').removeObject(this.get('selectedItem'));
+        this.set('selectedItem', null);
+        return;
+      }
+
       var self = this;
       return bootbox.confirm(I18n.t("admin.badges.delete_confirm"), I18n.t("no_value"), I18n.t("yes_value"), function(result) {
         if (result) {

app/assets/javascripts/admin/templates/badges.js.handlebars

@@ -8,7 +8,7 @@
         <a {{action selectBadge this}} {{bind-attr class="selected:active"}}>
           {{displayName}}
           {{#if newBadge}}
-            ({{i18n filters.new.lower_title}})
+            <span class="list-badge">{{i18n filters.new.lower_title}}</span>
           {{/if}}
         </a>
       </li>
@@ -51,14 +51,14 @@
         {{/if}}
       </div>
 
-      {{#unless readOnly}}
       <div>
         <span>
-            {{input type="checkbox" checked=allow_title}}
+          {{input type="checkbox" checked=allow_title disabled=readOnly}}
           {{i18n admin.badges.allow_title}}
         </span>
       </div>
 
+      {{#unless readOnly}}
         <div class='buttons'>
           <button {{action save}} {{bind-attr disabled=controller.disableSave}} class='btn btn-primary'>{{i18n admin.badges.save}}</button>
           <span class='saving'>{{savingStatus}}</span>

app/assets/stylesheets/common/admin/admin_base.scss

@@ -326,6 +326,16 @@ section.details {
 .badges {
   .content-list ul {
     margin-bottom: 10px;
+
+    .list-badge {
+      float: right;
+      font-size: 11px;
+      font-weight: normal;
+      padding: 0 6px;
+      color: $secondary;
+      background-color: scale-color($tertiary, $lightness: 50%);
+      border-radius: 3px;
+    }
   }
 
   .current-badge {