Merge branch 'fix-20982' of https://github.com/Starsam80/bootstrap into Starsam80-fix-20982

scss/_transitions.scss

@@ -2,26 +2,26 @@
   opacity: 0;
   @include transition($transition-fade);
 
-  &.active {
+  &.show {
     opacity: 1;
   }
 }
 
 .collapse {
   display: none;
-  &.active {
+  &.show {
     display: block;
   }
 }
 
 tr {
-  &.collapse.active {
+  &.collapse.show {
     display: table-row;
   }
 }
 
 tbody {
-  &.collapse.active {
+  &.collapse.show {
     display: table-row-group;
   }
 }