Fix attachments icon size on zoom in/out (#2853)

* fix attachments icon size on zoom in/out

* make public/css/index.css

public/less/_repository.less

@@ -602,7 +602,7 @@
                             vertical-align: middle;
                         }
                         span.ui.image {
-                            font-size: 8vw;
+                            font-size: 128px;
                             color: #000000;
                         }
                         span.ui.image:hover {