下拉选择框，允许插入额外按钮

Tevin

2021-11-14 70a71c5adb35d9c2b06669319b802ae18606c388

 forms/input/CInputScanCode.scss

@@ -24,4 +24,9 @@
    .at-input__icon {
        display: none;
    }
    .at-input__children {
        &::after {
            display: none;
        }
    }
}