Fixed #36578, Refs #35791 -- Ensured inline delete icon scales and stays centered in the admin.

Regression in 87ab54b. Refs #35829. Thank you Natalia Bidart for the review.

Author: sarahboyce

django/contrib/admin/static/admin/css/widgets.css

@@ -568,7 +568,8 @@ ul.timelist, .timelist li {
 .inline-deletelink {
  float: right;
  text-indent: -9999px;
- background: url(../img/inline-delete.svg) 0 0 no-repeat;
+ background: url(../img/inline-delete.svg) center center no-repeat;
+ background-size: contain;
  width: 1.5rem;
  height: 1.5rem;
  border: 0px none;