Fix a icon slice bug

style/components/confirm.less

@@ -25,7 +25,8 @@
 
     .anticon {
       font-size: 24px;
-      margin-right: 12px;
+      margin-right: 10px;
+      padding: 0 1px;
       position: relative;
       top: 5px;
     }

style/components/dialog/Dialog.less

@@ -74,7 +74,7 @@
 
   &-header {
     padding: 13px 20px 14px 20px;
-    border-radius: 5px 5px 0 0;
+    border-radius: @border-radius-base @border-radius-base 0 0;
     background: #fff;
     color: #666;
     border-bottom: 1px solid @border-color-split;
@@ -90,6 +90,6 @@
     border-top: 1px solid @border-color-split;
     padding: 8px 20px 16px 10px;
     text-align: right;
-    border-radius: 0 0 5px 5px;
+    border-radius: 0 0 @border-radius-base @border-radius-base;
   }
 }