Avoid to wrap element into div for InputCompletion

The div is only needed if it receive an input element otherwise the element can
receive the dropdown class. This avoid to increase the DOM depth and keep the
original display of the element.

src/common.js

@@ -2937,8 +2937,13 @@
 
     Sao.common.InputCompletion = Sao.class_(Object, {
         init: function(el, source, match_selected, format) {
-            el.wrap('<div class="dropdown"/>');
-            this.dropdown = el.parent();
+            if (!el.is('input')) {
+                el.addClass('dropdown');
+                this.dropdown = el;
+            } else {
+                el.wrap('<div class="dropdown"/>');
+                this.dropdown = el.parent();
+            }
             this.input = el.find('input').add(el.filter('input')).first();
             // bootstrap requires an element with data-toggle
             jQuery('<span/>', {