improved defaults and added a demo page showing that all button data attrs work on selects too

docs/forms/forms-selects.html

@@ -112,8 +112,16 @@
 					</div>
 
 
-	
+	<h2>Data attribute support</h2>
+	<p>You can specify any jQuery Mobile button data- attribute on a select element too.</p>		 
 			 
+	<div data-role="fieldcontain">
+		<label for="select-choice-3" class="select">Actions</label>
+		<select name="select-choice-3" id="select-choice-3" data-theme="a" data-icon="gear" data-inline="true">
+			<option value="edit">Edit</option>
+			<option value="delete">Delete</option>
+		</select>
+	</div>		 
 
 	</form>
 	

js/jquery.mobile.forms.select.js

@@ -7,14 +7,14 @@
 (function ( $ ) {
 $.widget( "mobile.selectmenu", $.mobile.widget, {
 	options: {
-		theme: undefined,
+		theme: null,
 		disabled: false, 
 		icon: 'arrow-d',
 		iconpos: 'right',
-		inline: undefined,
-		corners: undefined,
-		shadow: undefined,
-		iconshadow: undefined
+		inline: null,
+		corners: true,
+		shadow: true,
+		iconshadow: true
 	},
 	_create: function(){