fix paddings bigger thumb

less/topic.less

@@ -555,14 +555,16 @@
 					margin-right: 3px;
 
 					.scroller-thumb {
-						height: 30px;
+						height: 40px;
 						position: relative;
 						right: -6px;
+						padding-right: 15px;
+    					margin-right: -15px;
 						cursor: pointer;
 
 						.scroller-thumb-icon {
 							width: 9px;
-							height: 30px;
+							height: 40px;
 							background-color: @brand-primary;
 							position: relative;
 							display: inline-block;
@@ -572,7 +574,7 @@
 							font-weight: bolder;
 							user-select: none;
 							position: relative;
-							top: -10px;
+							top: -15px;
 							padding-right: 10px;
 						}
 					}