General style updates

Author: mattvague

app/assets/stylesheets/active_admin/structure/_title_bar.scss

@@ -2,9 +2,9 @@
   @include section-header;
   @include clearfix;
   @include box-sizing(border-box);
-  @include box-shadow(0 1px 2px rgba(0, 0, 0, 0.37));
+  @include box-shadow(0 1px 3px rgba(0,0,0,0.12), 0 0 1px #FFF inset);
   display: table;
-  border-bottom-color: #EEE;
+  border-bottom-color: #c4c4c4;
   width: 100%;
   position: relative; 
   margin: 0; 

spec/unit/views/components/paginated_collection_spec.rb

@@ -39,7 +39,7 @@
       let(:pagination) { paginated_collection(collection, :param_name => :post_page) }
 
       it "should customize the page number parameter in pagination links" do
-        pagination.find_by_tag('div')[1].content.should match(/\/admin\/posts\?post_page=2/)
+        pagination.find_by_class('pagination_information').first.content.should match(/\/admin\/posts\?post_page=2/)
       end
     end