Fixes #12822: Scope panel collapse styles to immediate panel bodies only

dist/css/bootstrap.css

@@ -4985,10 +4985,10 @@ a.list-group-item-danger.active:focus {
   background-color: #f5f5f5;
   border-color: #ddd;
 }
-.panel-default > .panel-heading + .panel-collapse .panel-body {
+.panel-default > .panel-heading + .panel-collapse > .panel-body {
   border-top-color: #ddd;
 }
-.panel-default > .panel-footer + .panel-collapse .panel-body {
+.panel-default > .panel-footer + .panel-collapse > .panel-body {
   border-bottom-color: #ddd;
 }
 .panel-primary {
@@ -4999,10 +4999,10 @@ a.list-group-item-danger.active:focus {
   background-color: #428bca;
   border-color: #428bca;
 }
-.panel-primary > .panel-heading + .panel-collapse .panel-body {
+.panel-primary > .panel-heading + .panel-collapse > .panel-body {
   border-top-color: #428bca;
 }
-.panel-primary > .panel-footer + .panel-collapse .panel-body {
+.panel-primary > .panel-footer + .panel-collapse > .panel-body {
   border-bottom-color: #428bca;
 }
 .panel-success {
@@ -5013,10 +5013,10 @@ a.list-group-item-danger.active:focus {
   background-color: #dff0d8;
   border-color: #d6e9c6;
 }
-.panel-success > .panel-heading + .panel-collapse .panel-body {
+.panel-success > .panel-heading + .panel-collapse > .panel-body {
   border-top-color: #d6e9c6;
 }
-.panel-success > .panel-footer + .panel-collapse .panel-body {
+.panel-success > .panel-footer + .panel-collapse > .panel-body {
   border-bottom-color: #d6e9c6;
 }
 .panel-info {
@@ -5027,10 +5027,10 @@ a.list-group-item-danger.active:focus {
   background-color: #d9edf7;
   border-color: #bce8f1;
 }
-.panel-info > .panel-heading + .panel-collapse .panel-body {
+.panel-info > .panel-heading + .panel-collapse > .panel-body {
   border-top-color: #bce8f1;
 }
-.panel-info > .panel-footer + .panel-collapse .panel-body {
+.panel-info > .panel-footer + .panel-collapse > .panel-body {
   border-bottom-color: #bce8f1;
 }
 .panel-warning {
@@ -5041,10 +5041,10 @@ a.list-group-item-danger.active:focus {
   background-color: #fcf8e3;
   border-color: #faebcc;
 }
-.panel-warning > .panel-heading + .panel-collapse .panel-body {
+.panel-warning > .panel-heading + .panel-collapse > .panel-body {
   border-top-color: #faebcc;
 }
-.panel-warning > .panel-footer + .panel-collapse .panel-body {
+.panel-warning > .panel-footer + .panel-collapse > .panel-body {
   border-bottom-color: #faebcc;
 }
 .panel-danger {
@@ -5055,10 +5055,10 @@ a.list-group-item-danger.active:focus {
   background-color: #f2dede;
   border-color: #ebccd1;
 }
-.panel-danger > .panel-heading + .panel-collapse .panel-body {
+.panel-danger > .panel-heading + .panel-collapse > .panel-body {
   border-top-color: #ebccd1;
 }
-.panel-danger > .panel-footer + .panel-collapse .panel-body {
+.panel-danger > .panel-footer + .panel-collapse > .panel-body {
   border-bottom-color: #ebccd1;
 }
 .well {

less/mixins.less

@@ -424,12 +424,12 @@
     background-color: @heading-bg-color;
     border-color: @heading-border;
 
-    + .panel-collapse .panel-body {
+    + .panel-collapse > .panel-body {
       border-top-color: @border;
     }
   }
   & > .panel-footer {
-    + .panel-collapse .panel-body {
+    + .panel-collapse > .panel-body {
       border-bottom-color: @border;
     }
   }