add [hidden] utility for hiding any html element (see #15274 for more context)

1 files changed, 8 insertions, 4 deletions

diff --git a/docs/dist/css/bootstrap.css b/docs/dist/css/bootstrap.css
index 8a4088844..e13d29dab 100644
--- a/docs/dist/css/bootstrap.css
+++ b/docs/dist/css/bootstrap.css
@@ -4625,7 +4625,7 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   bottom: -11px;
   left: 50%;
   margin-left: -11px;
-  border-top-color: fadein(rgba(0, 0, 0, .2), 5%);
+  border-top-color: rgba(0, 0, 0, .25);
   border-bottom-width: 0;
 }
 .popover.top > .arrow:after {
@@ -4639,7 +4639,7 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   top: 50%;
   left: -11px;
   margin-top: -11px;
-  border-right-color: fadein(rgba(0, 0, 0, .2), 5%);
+  border-right-color: rgba(0, 0, 0, .25);
   border-left-width: 0;
 }
 .popover.right > .arrow:after {
@@ -4654,7 +4654,7 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   left: 50%;
   margin-left: -11px;
   border-top-width: 0;
-  border-bottom-color: fadein(rgba(0, 0, 0, .2), 5%);
+  border-bottom-color: rgba(0, 0, 0, .25);
 }
 .popover.bottom > .arrow:after {
   top: 1px;
@@ -4668,7 +4668,7 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   right: -11px;
   margin-top: -11px;
   border-right-width: 0;
-  border-left-color: fadein(rgba(0, 0, 0, .2), 5%);
+  border-left-color: rgba(0, 0, 0, .25);
 }
 .popover.left > .arrow:after {
   right: 1px;
@@ -4936,6 +4936,10 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   display: block !important;
 }
 
+[hidden] {
+  display: none !important;
+}
+
 .invisible {
   visibility: hidden;
 }