Autocomplete: Updated appendTo option based on .ui-front implementation.

Author: scottgonzalez

entries/autocomplete.xml

@@ -29,8 +29,8 @@
 	<note id="functional-css"/>
 	<added>1.8</added>
 	<options>
-		<option name="appendTo" type="Selector" default='"body"' example-value='"#someElem"'>
-			<desc>Which element the menu should be appended to. Override this when the autocomplete is inside a <code>position: fixed</code> element. Otherwise the popup menu would still scroll with the page.</desc>
+		<option name="appendTo" type="Selector" default="null" example-value='"#someElem"'>
+			<desc>Which element the menu should be appended to. When the value is <code>null</code>, the parents of the input field will be checked for a class of <code>ui-front</code>. If an element with the <code>ui-front</code> class is found, the menu will be appended to that element. Regardless of the value, if no element is found, the menu will be appended to the body.</desc>
 		</option>
 		<option name="autoFocus" type="Boolean" default="false" example-value="true">
 			<desc>If set to <code>true</code> the first item will automatically be focused when the menu is shown.</desc>