Add left margin to the Add button on the admin panels add form

[Ryan J Ollos]

This is a small refinement following [11164]. Now that the Add button is displayed in a horizontal form, I think it could benefit from some margin on the left.

trac/htdocs/css/admin.css

@@ -60 +60 @@
  padding: 0.2em 0.5em 0.2em 0;
  white-space: nowrap;
 }
+form.addnew div.buttons { margin: 0 0 0 0.5em; }
 form.addnew div.buttons input { margin: 0 0.5em 0 0; }
 form.addnew p.hint,
 form.addnew span.hint {
  padding-left: 0.5em;
- padding-right: 0.5em;
 }
 form.addnew p.help { margin-top: 0.5em; }
 form.addnew br { display: none; }