alter button padding

style/mixins/button.less

@@ -250,8 +250,8 @@
 
   .@{btnClassName}:not(:first-child):not(:last-child) {
     border-radius: 0;
-    padding-left: 7px;
-    padding-right: 7px;
+    padding-left: 8px;
+    padding-right: 8px;
   }
 
   > .@{btnClassName}:first-child {
@@ -259,14 +259,14 @@
     &:not(:last-child) {
       border-bottom-right-radius: 0;
       border-top-right-radius: 0;
-      padding-right: 7px;
+      padding-right: 8px;
     }
   }
 
   > .@{btnClassName}:last-child:not(:first-child) {
     border-bottom-left-radius: 0;
     border-top-left-radius: 0;
-    padding-left: 7px;
+    padding-left: 8px;
   }
 
  & > & {
@@ -281,13 +281,13 @@
     > .@{btnClassName}:last-child {
       border-bottom-right-radius: 0;
       border-top-right-radius: 0;
-      padding-right: 7px;
+      padding-right: 8px;
     }
   }
 
  & > &:last-child:not(:first-child) > .@{btnClassName}:first-child {
     border-bottom-left-radius: 0;
     border-top-left-radius: 0;
-    padding-left: 7px;
+    padding-left: 8px;
   }
 }

style/themes/default/custom.less

@@ -70,10 +70,10 @@
 @btn-disable-bg         : #f4f4f4;
 @btn-disable-border     : @border-color-base;
 
-@btn-padding-base       : 4px 11px;
+@btn-padding-base       : 4px 15px;
 
 @btn-font-size-lg       : 14px;
-@btn-padding-lg         : 4px 11px 5px 11px;
+@btn-padding-lg         : 4px 15px 5px 15px;
 
 @btn-padding-sm         : 1px 7px;