Panels: Prevent panel content from escaping its bounds (#52167) (#52217)

(cherry picked from commit 3131d12738)

Co-authored-by: kay delaney <45561153+kaydelaney@users.noreply.github.com>

public/sass/pages/_dashboard.scss

@@ -46,6 +46,7 @@
   padding: $panel-padding;
   width: 100%;
   flex-grow: 1;
+  contain: strict;
   height: calc(100% - #{$panel-header-height});
 
   &--no-padding {