Resizable: Keep user-provided handles on destroy

Closes gh-1798
Ref gh-1795

Author: kdinev

tests/unit/resizable/options.js

@@ -434,8 +434,10 @@ QUnit.test( "zIndex, applied to all handles", function( assert ) {
 } );
 
 QUnit.test( "setOption handles", function( assert ) {
-	assert.expect( 15 );
+	assert.expect( 19 );
 
+	// https://bugs.jqueryui.com/ticket/3423
+	// https://bugs.jqueryui.com/ticket/15084
 	var target = $( "<div></div>" ).resizable(),
 		target2 = $( "<div>" +
 					"<div class='ui-resizable-handle ui-resizable-e'></div>" +
@@ -470,6 +472,12 @@ QUnit.test( "setOption handles", function( assert ) {
 
 	target2.resizable( "option", "handles", "e, s, w" );
 	checkHandles( target2, [ "e", "s", "w" ] );
+
+	target.resizable( "destroy" );
+	checkHandles( target, [ ] );
+
+	target2.resizable( "destroy" );
+	checkHandles( target2, [ "e", "w" ] );
 } );
 
 QUnit.test( "alsoResize + containment", function( assert ) {

ui/widgets/resizable.js

@@ -187,15 +187,14 @@ $.widget( "ui.resizable", $.ui.mouse, {
 	_destroy: function() {
 
 		this._mouseDestroy();
+		this._addedHandles.remove();
 
 		var wrapper,
 			_destroy = function( exp ) {
 				$( exp )
 					.removeData( "resizable" )
 					.removeData( "ui-resizable" )
-					.off( ".resizable" )
-					.find( ".ui-resizable-handle" )
-						.remove();
+					.off( ".resizable" );
 			};
 
 		// TODO: Unwrap at same DOM position