Issue #2158943: Replace jQuery UI dialog with supported library or polyfill

core/assets/vendor/google-chrome/dialog-polyfill/dialog-polyfill.css

+dialog {
+  position: absolute;
+  left: 0; right: 0;
+  width: -moz-fit-content;
+  width: -webkit-fit-content;
+  width: fit-content;
+  height: -moz-fit-content;
+  height: -webkit-fit-content;
+  height: fit-content;
+  margin: auto;
+  border: solid;
+  padding: 1em;
+  background: white;
+  color: black;
+  display: block;
+}
+
+dialog:not([open]) {
+  display: none;
+}
+
+dialog + .backdrop {
+  position: fixed;
+  top: 0; right: 0; bottom: 0; left: 0;
+  background: rgba(0,0,0,0.1);
+}
+
+._dialog_overlay {
+  position: fixed;
+  top: 0; right: 0; bottom: 0; left: 0;
+}
+
+dialog.fixed {
+  position: fixed;
+  top: 50%;
+  transform: translate(0, -50%);
+}
\ No newline at end of file

[Théodore Biadala]

Usually we don't have multiple levels folders in here.

Should be dialog-polyfill/ not google-chrome/dialog-polyfill