feat: improve the display effect of web-uploader images

resources/assets/dcat/extra/upload.scss

@@ -301,7 +301,8 @@
 
 .web-uploader .filelist li img {
   max-width: 95%;
-  height: 120px
+  height: 120px;
+  object-fit: cover;
 }
 
 .web-uploader .filelist li p.error {

resources/assets/dcat/plugins/webuploader/webuploader.css

@@ -303,7 +303,8 @@
 
 .web-uploader .filelist li img {
 	width: auto;
-	height: 120px
+	height: 120px;
+	object-fit: cover;
 }
 
 .web-uploader .filelist li p.error {

resources/dist/dcat/plugins/webuploader/webuploader.css

@@ -303,7 +303,8 @@
 
 .web-uploader .filelist li img {
 	width: auto;
-	height: 120px
+	height: 120px;
+	object-fit: cover;
 }
 
 .web-uploader .filelist li p.error {