add missing stylesheet for the asset collections section in the back-office

Gemfile.lock

@@ -70,7 +70,7 @@ GEM
       term-ansicolor (~> 1.0.4)
     cucumber-rails (0.3.2)
       cucumber (>= 0.8.0)
-    culerity (0.2.13)
+    culerity (0.2.14)
     custom_fields (1.0.0.beta2)
       activesupport (>= 3.0.0)
       locomotive_carrierwave
@@ -89,11 +89,11 @@ GEM
     diff-lcs (1.1.2)
     erubis (2.6.6)
       abstract (>= 1.0.0)
-    excon (0.3.6)
+    excon (0.3.7)
     factory_girl (1.3.2)
-    factory_girl_rails (1.0)
+    factory_girl_rails (1.0.1)
       factory_girl (~> 1.3)
-      rails (>= 3.0.0.beta4)
+      railties (>= 3.0.0)
     ffi (0.6.3)
       rake (>= 0.8.7)
     fog (0.3.7)
@@ -106,16 +106,16 @@ GEM
       nokogiri (~> 1.4.3.1)
       ruby-hmac
     formatador (0.0.16)
-    formtastic (1.2.2)
+    formtastic (1.2.3)
       actionpack (>= 2.3.7)
       activesupport (>= 2.3.7)
-      i18n (>= 0.4.0)
+      i18n (~> 0.4)
     gherkin (2.1.5)
       trollop (~> 1.16.2)
     growl-glue (1.0.7)
     haml (3.0.18)
     has_scope (0.5.0)
-    heroku (1.15.1)
+    heroku (1.16.2)
       json_pure (>= 1.2.0, < 1.5.0)
       launchy (~> 0.3.2)
       rest-client (>= 1.4.0, < 1.7.0)
@@ -147,7 +147,7 @@ GEM
     locomotive_mongoid_acts_as_tree (0.1.5.1)
       bson (>= 0.20.1)
       mongoid (<= 2.0.0.beta.19)
-    mail (2.2.13)
+    mail (2.2.14)
       activesupport (>= 2.3.6)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
@@ -238,7 +238,7 @@ GEM
       polyglot (>= 0.3.1)
     trollop (1.16.2)
     tzinfo (0.3.23)
-    unicorn (3.2.1)
+    unicorn (3.3.1)
       kgio (~> 2.1)
       rack
     warden (0.10.7)

config/assets.yml

@@ -82,6 +82,7 @@ stylesheets:
     - public/stylesheets/admin/buttons.css
     - public/stylesheets/admin/formtastic.css
     - public/stylesheets/admin/formtastic_changes.css
+    - public/stylesheets/admin/assets.css
     - public/stylesheets/admin/application.css
     - public/stylesheets/admin/safari.css
   fancybox:

public/stylesheets/admin/application.css

@@ -1,5 +1,3 @@
-@import url(/stylesheets/admin/assets.css);
-
 /* ___ application messages ___ */
 
 div.notice {