Avoid line-breaks when showing the log icon.

services/web/public/stylesheets/app/editor/pdf.less

@@ -122,7 +122,7 @@
 			font-weight: 700;
 
 			.fa {
-				display: none;
+				opacity: 0;
 			}
 		}
 		.entry-message {
@@ -138,7 +138,7 @@
 		&:hover .line-no {
 			color: inherit;
 			.fa {
-				display: inline-block;
+				opacity: 1;
 			}
 		}