Fixes #12593: Add support for table bodies and table rows to the collapse plugin

dist/css/bootstrap.css

@@ -2366,6 +2366,12 @@ input[type="button"].btn-block {
 .collapse.in {
   display: block;
 }
+tr.collapse.in {
+  display: table-row;
+}
+tbody.collapse.in {
+  display: table-row-group;
+}
 .collapsing {
   position: relative;
   height: 0;

less/component-animations.less

@@ -17,10 +17,12 @@
 
 .collapse {
   display: none;
-  &.in {
-    display: block;
-  }
+
+  &.in      { display: block; }
+  tr&.in    { display: table-row; }
+  tbody&.in { display: table-row-group; }
 }
+
 .collapsing {
   position: relative;
   height: 0;