上传按钮错误修复

src/components/Qrcode.css

@@ -357,6 +357,10 @@ input[type="number"]{
     margin-bottom: 10px;
 }
 
+.ul-btn {
+    float: left;
+}
+
 .dl-btn {
     cursor: pointer;
     font-size: 0.9em;

src/components/param/ParamUpload.js

@@ -7,7 +7,7 @@ const ParamUpload = ({ rendererIndex, paramIndex, onChange }) => (
         <label
             htmlFor="image_upload"
             key={"label_" + rendererIndex + "_" + paramIndex}
-            className="dl-btn"
+            className="dl-btn ul-btn"
             style={{textAlign: "center"}}
         >
             上传图片