Selectable: Move selectable into widgets folder

Ref #13885

demos/bootstrap.js

@@ -35,7 +35,8 @@ var widgets = [
 	"menu",
 	"mouse",
 	"progressbar",
-	"resizable"
+	"resizable",
+	"selectable"
 ];
 
 function getPath( module ) {

tests/unit/selectable/common.js

@@ -1,6 +1,6 @@
 define( [
 	"lib/common",
-	"ui/selectable"
+	"ui/widgets/selectable"
 ], function( common ) {
 
 common.testWidget( "selectable", {

tests/unit/selectable/events.js

@@ -1,7 +1,7 @@
 define( [
 	"jquery",
 	"lib/helper",
-	"ui/selectable"
+	"ui/widgets/selectable"
 ], function( $, testHelpers ) {
 
 module("selectable: events");

tests/unit/selectable/methods.js

@@ -1,6 +1,6 @@
 define( [
 	"jquery",
-	"ui/selectable"
+	"ui/widgets/selectable"
 ], function( $ ) {
 
 module("selectable: methods");

tests/unit/selectable/options.js

@@ -1,6 +1,6 @@
 define( [
 	"jquery",
-	"ui/selectable"
+	"ui/widgets/selectable"
 ], function( $ ) {
 
 module("selectable: options");

ui/widgets/selectable.js

@@ -20,9 +20,9 @@
 		// AMD. Register as an anonymous module.
 		define([
 			"jquery",
-			"./version",
-			"./widgets/mouse",
-			"./widget"
+			"./mouse",
+			"../version",
+			"../widget"
 		], factory );
 	} else {