Issue #3525406: Use logical properties for RTL compatibility

css/entity-reference-field-autocomplete-filter.css

 .entity-reference-filterable-autocomplete-wrapper {
   display: flex;
   align-items: center;
-}
-
-.entity-reference-filterable-autocomplete-wrapper
-  .entity-reference-filterable-autocomplete-bundle {
-  margin-right: 1rem;
+  grid-gap: 1rem;
 }