forms.less: top-align field lables and related...

...items like icons. They used to be bottom-aligned, resulting in
slightly confusing form layouts when text areas where involved.

public/css/icinga/forms.less

@@ -200,6 +200,14 @@ form label {
   width: 10em;
 }
 
+form div.element > * {
+  vertical-align: top;
+}
+
+form dt {
+  vertical-align: top;
+}
+
 select, input[type=text], textarea {
   width: 20em;
   display: inline-block;