Fix styling of the bib-loading div.

services/web/public/stylesheets/app/editor/binary-file.less

@@ -17,6 +17,11 @@
 		font-size: 24px;
 		color: @gray;
 	}
+	.bib-loading {
+		font-size: 24px;
+		color: @gray;
+		margin-bottom: 12px;
+	}
 	.bib-preview {
 		margin-bottom: 12px;
 		.scroll-container {