Merge branch 'fix-remove-button-alignment' into 'master'

In SSH key detailed view, align the "Remove" button with the right container

Also fixes a bootlint warning.

Before:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/d6d8765ed9dceb6a31a6b4475b2166e1/image.png)

After:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/8252211125ace212335aa6bf2ba78549/image.png)


See merge request !1555

app/views/profiles/keys/_key_details.html.haml

@@ -18,5 +18,6 @@
       %code.key-fingerprint= @key.fingerprint
     %pre.well-pre
       = @key.key
-  .pull-right
-    = link_to 'Remove', path_to_key(@key, is_admin), data: {confirm: 'Are you sure?'}, method: :delete, class: "btn btn-remove delete-key"
+  .col-md-12
+    .pull-right
+      = link_to 'Remove', path_to_key(@key, is_admin), data: {confirm: 'Are you sure?'}, method: :delete, class: "btn btn-remove delete-key"