CSS: .repository .sha.label -> .ui .sha.label

This is because SHA1 label is used in many other places, not only inside
.repository container.

public/less/_base.less

@@ -219,6 +219,14 @@ pre {
 		}
 	}
 
+	.sha.label {
+		font-family: Consolas, Menlo, Monaco, "Lucida Console", monospace;
+		font-size: 14px;
+		padding: 6px 10px 4px 10px;
+		font-weight: normal;
+		margin: 0 6px;
+	}
+
 	&.status.buttons {
 		.octicon {
 			margin-right: 4px;

public/less/_repository.less

@@ -630,12 +630,6 @@
 	    width: 120px;
 		}
 	}
-	.sha.label {
-		font-family: Consolas, Menlo, Monaco, "Lucida Console", monospace;
-		font-size: 14px;
-		padding: 6px 10px 4px 10px;
-		font-weight: normal;
-	}
 
 	.diff-detail-box {
     margin: 15px 0;