案例管理优化

stdiet-ui/src/components/FileDownload/MuchFileDown.vue

@@ -132,7 +132,7 @@ export default {
       downSigleFile(file.downUrl, file.fileName);
     },
     isImage(name){
-      var idx = name.indexOf('.');
+      var idx = name.lastIndexOf(".");
       if (idx === -1) {
         return false;
       }

stdiet-ui/src/components/FileUpload/DragUploadEdit.vue

@@ -2,7 +2,7 @@
   <div>
     <div v-for="(item, index) in oldCaseFileList">
       <span style="margin-right: 10px;">
-        {{item.fileName ? (item.fileName.substring(0,15)+"..."): ""}}
+        {{item.fileName.length > 15 ? (item.fileName.substring(0,15)+"...") : item.fileName}}
       </span>
       <el-button style="margin-left: 10px;" type="danger" size="small" @click="removeOldFile(index)">移除该文件</el-button>
     </div>