Merge branch 'compact-sidebar' into 'master'

Smaller font and leing height for sidebar elements

Recently we added few more entries to project sidebar navigation making it overflow on laptops

1280x720 resolution now:

![Screenshot_2015-07-10_15.34.52](https://gitlab.com/gitlab-org/gitlab-ce/uploads/19f5c77e5d19cf935a4323a079020f7b/Screenshot_2015-07-10_15.34.52.png)

After this fix:

![Screenshot_2015-07-10_15.34.35](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ca9cdcc2ce9c9b6aabb823ba64a3a30a/Screenshot_2015-07-10_15.34.35.png)

This should help for people who use scaling with retina or owners of MacBook Air laptops

cc @JobV

See merge request !955

app/assets/stylesheets/generic/sidebar.scss

@@ -39,12 +39,12 @@
     }
 
     a {
+      padding: 7px 15px;
+      font-size: 13px;
+      line-height: 18px;
       color: $gray;
       display: block;
       text-decoration: none;
-      padding: 8px 15px;
-      font-size: 14px;
-      line-height: 20px;
       padding-left: 16px;
 
       &:hover {
@@ -114,9 +114,6 @@
       width: $sidebar_collapsed_width;
 
       li a {
-        font-size: 14px;
-        padding: 8px 15px;
-        text-align: left;
         padding-left: 16px;
       }
     }