Update left to side navigation for focus-not-obscured-minimum (#3765)

Closes #3658
Updated one instance of left to side navigation. Decided to leave first
two left navigation instances because they don't seem to respond to
right-left layout. Checked the rest of the understanding folder,
couldn't find anymore instances.

understanding/22/focus-not-obscured-minimum.html

@@ -99,7 +99,7 @@ <h4>User openable, persistent disclosures</h4>
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                </li>
                <li>
-               <strong>When focus leaves the additional content, the additional content is automatically hidden or collapsed, or the content can be hidden or collapsed by use of a dedicated keyboard command (for example, the <kbd>Escape</kbd> key</strong>.) This is very similar to patterns discussed previously under Non-persistent opened information. A distinguishing factor can be that the user's last point of interaction in the disclosure is preserved (it persists) even though it may be hidden until a user returns. Some trees and left navigation patterns behave this way.
+               <strong>When focus leaves the additional content, the additional content is automatically hidden or collapsed, or the content can be hidden or collapsed by use of a dedicated keyboard command (for example, the <kbd>Escape</kbd> key</strong>.) This is very similar to patterns discussed previously under Non-persistent opened information. A distinguishing factor can be that the user's last point of interaction in the disclosure is preserved (it persists) even though it may be hidden until a user returns. Some trees and side navigation patterns behave this way.
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