Change record status: 
Project: 
Introduced in branch: 
6.0.x
Introduced in version: 
dev
Description: 

The change was included to allow the element to be accessed as a button, improving accessibility (see issue for more info).

The code used to be:

<span class="shwpd">
  ...
</span>

And now it changed to

<button class="shwpd">
  ...
</button>

Aditionally CSS styles were added to hide the button's default border.

Impacts: 
Themers