Display .sheets .btn.right by default

Fix #8

This commit reenables the "see previous versions" button on the
stylesheet modification page. This button was being hidden previously
before as it was linking to something else that was deemed not needed
but should now be interactive as people should have quick access to
the stylesheet history.

Naut CSS.css

@@ -1568,7 +1568,6 @@
 			font-family: Calibri, Candara, Segoe, "Segoe UI", Optima, Arial, sans-serif;
 		}
 
-			.sheets .btn.right {display: none;}
 			.sheets .col textarea {width: 100%;background-color: #fff;}
 				.sheets .col textarea:hover {border-color: #B1B1B1;}
 					.sheets .col textarea:focus {border-color: #5b92fa;}