make gs dismissal icon translucent

app/views/aspects/index.html.haml

@@ -10,7 +10,7 @@
   #welcome-to-diaspora
     .container{:style => "position: relative;"}
       .right
-        = link_to image_tag('deletelabel.png'), getting_started_completed_path
+        = link_to image_tag('deletelabel.png'), getting_started_completed_path, :id => "gs-skip-x"
       .span-23
         %h1
           = t('.welcome_to_diaspora', :name => current_user.first_name)

public/stylesheets/sass/application.sass

@@ -3410,3 +3410,10 @@ a.toggle_selector
 #gs-shim
   :position absolute
   :top 380px
+
+#gs-skip-x
+  @include opacity(0.5)
+  @include transition(opacity)
+
+  &:hover
+    @include opacity(1)