hgweb: infinite scroll support for coal style

mercurial/templates/static/style-coal.css

@@ -331,3 +331,27 b' ul#graphnodes li .info {'
 .breadcrumb a {
     color: blue;
 }
+
+.scroll-loading {
+    -webkit-animation: change_color 1s linear 0s infinite alternate;
+    -moz-animation: change_color 1s linear 0s infinite alternate;
+    -o-animation: change_color 1s linear 0s infinite alternate;
+    animation: change_color 1s linear 0s infinite alternate;
+}
+
+@-webkit-keyframes change_color {
+  from { background-color: #A0CEFF; } to {  }
+}
+@-moz-keyframes change_color {
+  from { background-color: #A0CEFF; } to {  }
+}
+@-o-keyframes change_color {
+  from { background-color: #A0CEFF; } to {  }
+}
+@keyframes change_color {
+  from { background-color: #A0CEFF; } to {  }
+}
+
+.scroll-loading-error {
+    background-color: #FFCCCC !important;
+}