fix .btn-group-xs portion of #10979

dist/css/bootstrap.css

@@ -2622,8 +2622,7 @@ fieldset[disabled] .btn-link:focus {
   border-radius: 6px;
 }
 
-.btn-sm,
-.btn-xs {
+.btn-sm {
   padding: 5px 10px;
   font-size: 12px;
   line-height: 1.5;
@@ -2632,6 +2631,9 @@ fieldset[disabled] .btn-link:focus {
 
 .btn-xs {
   padding: 1px 5px;
+  font-size: 12px;
+  line-height: 1.5;
+  border-radius: 3px;
 }
 
 .btn-block {
@@ -3754,7 +3756,6 @@ input[type="button"].btn-block {
 }
 
 .btn-group-xs > .btn {
-  padding: 5px 10px;
   padding: 1px 5px;
   font-size: 12px;
   line-height: 1.5;

less/buttons.less

@@ -122,13 +122,12 @@
   // line-height: ensure even-numbered height of button next to large input
   .button-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
 }
-.btn-sm,
-.btn-xs {
+.btn-sm {
   // line-height: ensure proper height of button next to small input
   .button-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
 }
 .btn-xs {
-  padding: 1px 5px;
+  .button-size(@padding-xs-vertical; @padding-xs-horizontal; @font-size-small; @line-height-small; @border-radius-small);
 }
 
 

less/variables.less

@@ -84,6 +84,9 @@
 @padding-small-vertical:         5px;
 @padding-small-horizontal:       10px;
 
+@padding-xs-vertical:            1px;
+@padding-xs-horizontal:          5px;
+
 @line-height-large:              1.33;
 @line-height-small:              1.5;