new-admin-theme: strong and italic font-sizes in form .explanation

[ebellempire]

Preparing a plugin for the admin theme update and noticed a tiny issue that could be easy to miss.

In the example below, the paragraph text is set to 16px via .explanation in _items.scss but the em and strong seem to inherit the 14px size from * in typography.scss:

<p class="explanation">Lorem <strong>ipsum</strong> dolor <em>sit</em> amet.</p>

Here's what that looks like in my test plugin config form...

---

And here's what it would look like if you added formatted text to the Geolocation plugin config form...

---