fix paginator zindex and unread width

less/category.less

@@ -50,7 +50,6 @@
 					.transition(.2s ease-in-out opacity);
 				}
 
-				width: 50px;
 				float: left;
 			}
 

less/topic.less

@@ -326,6 +326,7 @@
 		background-color: #eee;
 		bottom: 0px;
 		left: 0px;
+		z-index: 100;
 
 		.wrapper {
 			padding: 5px 0px 5px 0px;