Switch to side-by-side view

--- a/Allura/allura/templates/widgets/download_button.html
+++ b/Allura/allura/templates/widgets/download_button.html
@@ -1 +1 @@
-<span class="download-button-{{project.shortname}}" style="margin-bottom: 1em; display: block;"></span>
+<span class="download-button-{{project._id}}" style="margin-bottom: 1em; display: block;"></span>