Icon-only button changes causes expando-row regression

[ppvg]

Current main has a breaking change on icon-only buttons. Previously this markup resulted in an icon-only button:

<button class="icon icon-?">Label text</button>

With current main, icon-only buttons need the icon-only class and a separate span for the button:

<button class="icon-inly"><span class="icon icon-?"></span>Label text</button>

While this change is intentional and desired for accessibility reasons, it causes a regression in the expando row, resulting in the label being visible: