chore: 文件上传默认拖入文件也应该有视觉反馈 (#3779)

scss/components/form/_file.scss

@@ -222,6 +222,10 @@
     }
   }
 
+  &-dropzone.is-active &-acceptTip {
+    border-color: var(--info);
+  }
+
   &-sum {
     font-size: var(--fontSizeSm);
 

src/renderers/Form/InputFile.tsx

@@ -1316,7 +1316,7 @@ export default class FileControl extends React.Component<FileProps, FileState> {
             >
               <input disabled={disabled} {...getInputProps()} />
 
-              {drag ? (
+              {drag || isDragActive ? (
                 <div
                   className={cx('FileControl-acceptTip')}
                   onClick={this.handleSelect}