update snippets list design

app/assets/stylesheets/pages/snippets.scss

+.snippet-row {
+  .title {
+    margin-bottom: 2px;
+  }
+
+  .snippet-filename {
+    padding: 0 2px;
+  }
+}
+
 .snippet-form-holder .file-holder .file-title {
   padding: 2px;
 }

app/views/shared/snippets/_snippet.html.haml

@@ -4,14 +4,11 @@
   .title
     = link_to reliable_snippet_path(snippet) do
       = snippet.title
-      - if snippet.private?
-        %span.label.label-gray.hidden-xs
-          = icon('lock')
-          private
-    %span.monospace.pull-right.hidden-xs
-      = snippet.file_name
+    - if snippet.file_name
+      %span.snippet-filename.monospace.hidden-xs
+        = snippet.file_name
 
-    %ul.controls.visible-xs
+    %ul.controls
       %li
         - note_count = snippet.notes.user.count
         = link_to reliable_snippet_path(snippet, anchor: 'notes'), class: ('no-comments' if note_count.zero?) do
@@ -22,11 +19,11 @@
           = visibility_level_label(snippet.visibility_level)
         = visibility_level_icon(snippet.visibility_level, fw: false)
 
-  %small.pull-right.cgray.hidden-xs
-    - if snippet.project_id?
-      = link_to snippet.project.name_with_namespace, namespace_project_path(snippet.project.namespace, snippet.project)
-
-  .snippet-info.hidden-xs
+  .snippet-info
+    #{snippet.to_reference} ·
+    authored #{time_ago_with_tooltip(snippet.created_at, placement: 'bottom')} by
     = link_to user_snippets_path(snippet.author) do
       = snippet.author_name
-    authored #{time_ago_with_tooltip(snippet.created_at)}
+
+    .pull-right.snippet-updated-at
+      %span updated #{time_ago_with_tooltip(snippet.updated_at, placement: 'bottom', html_class: 'snippet_update_ago')}