Pull request #2244: 无jira任务 style:漏了个后缀

Merge in VISUAL/fineui from ~CLAIRE.TANG/fineui:master to master

* commit 'd1f152e600a153747669777a4ec2a025cb1ce0f5':
  无jira任务 revert:回滚
  无jira任务 feat:IconTextItem增加属性textWidth
  无jira任务 style:增加后缀

src/less/lib/background.less

@@ -7,7 +7,7 @@
 @background-trans-color: "background/trans_normal.png";
 @background-trans-color-disabled: "background/trans_disable.png";
 @background-auto-color-square-normal: "icon/auto_square_normal.png";
-@background-auto-color-no-square-normal: "icon/auto_no_square_normal";
+@background-auto-color-no-square-normal: "icon/auto_no_square_normal.png";
 
 @background-farbtastic-wheel:"background/wheel.png";
 @background-farbtastic-overlay:"background/mask.png";