#25110 Missing border radius on input group with validation feedback

Created by: dejakob

Issue reported

With new beta 3 and using the new input-group stuff, inputs inside input-groups with some validation feedback after them are missing the border-radius.

See: #25110

Cause of issue

There is a selector in _input-group.scss that sets border-radius to 0 on all elements within an input-group that are not a dropdown or the last element:

.input-group {
  > :not(:last-child):not(.dropdown-toggle):not(.dropdown-menu)

Proposed solution

I added an extra pseudo-selector to check if there is no .invalid-feedback element coming after it, before overriding the border-radius to 0.