Fix #16072: Clicking into input field within dropdown no longer closes the dropdown

Closes #16073 by merging it

js/dropdown.js

@@ -99,6 +99,8 @@
 
       if (!$parent.hasClass('open')) return
 
+      if (e && e.type == 'click' && /input|textarea/i.test(e.target.tagName) && $.contains($parent[0], e.target)) return
+
       $parent.trigger(e = $.Event('hide.bs.dropdown', relatedTarget))
 
       if (e.isDefaultPrevented()) return