Editor: Add zh for Sidebar.

editor/js/Sidebar.Project.js

@@ -199,7 +199,7 @@ Sidebar.Project = function ( editor ) {
 	buttonsRow.add( addButton );
 	*/
 
-	var assignMaterial = new UI.Button().setLabel( 'Assign' ).setMargin( '0px 5px' );
+	var assignMaterial = new UI.Button().setLabel( strings.getKey( 'sidebar/project/Assign' ) ).setMargin( '0px 5px' );
 	assignMaterial.onClick( function () {
 
 		if ( editor.selected !== null ) {

editor/js/Strings.js

@@ -286,6 +286,7 @@ var Strings = function ( config ) {
 			'sidebar/project/antialias': 'antialias',
 			'sidebar/project/shadows': 'shadows',
 			'sidebar/project/materials': 'Materials',
+			'sidebar/project/Assign': 'Assign',
 
 			'sidebar/settings': 'Settings',
 			'sidebar/settings/language': 'Language',
@@ -563,7 +564,8 @@ var Strings = function ( config ) {
 			'sidebar/project/renderer': '渲染器',
 			'sidebar/project/antialias': '抗锯齿',
 			'sidebar/project/shadows': '阴影',
-			'sidebar/project/materials': 'Materials',
+			'sidebar/project/materials': '材质',
+			'sidebar/project/Assign': '应用',
 
 			'sidebar/settings': '设置',
 			'sidebar/settings/language': '语言',