#325 Changes based on review on 4/24/2017

Moved child element dfiscussion to states and properties section

aria-practices.html

@@ -502,8 +502,6 @@ <h3>Dialog (Modal)</h3>
         That is, <kbd>Tab</kbd> and <kbd>Shift + Tab</kbd> do not move focus outside the dialog.
         However, unlike most non-modal dialogs, modal dialogs do not provide means for moving keyboard focus outside the dialog window without closing the dialog.
       </p>
-      <p>For all dialogs, all controls required to operate the dialog are child nodes of the element which has role set to dialog.
-      </p>
       <p>
         The <a href="#alertdialog" class="role-reference">alertdialog</a> role is a special-case dialog role
         designed specifically for dialogs that divert users' attention to a brief, important message.
@@ -557,6 +555,7 @@ <h4>Keyboard Interaction</h4>
         <h4>WAI-ARIA Roles, States, and Properties</h4>
         <ul>
           <li>The element that serves as the dialog container has a role of <a href="#dialog" class="role-reference">dialog</a>.</li>
+          <li>All controls required to operate the dialog are child nodes of the element which has role set to dialog.</li>
           <li>The dialog container element has <a href="#aria-modal" class="property-reference">aria-modal</a> set to <code>true</code>.</li>
           <li>The dialog has either:
             <ul>
@@ -571,7 +570,7 @@ <h4>WAI-ARIA Roles, States, and Properties</h4>
             Specifying descriptive elements enables screen readers to announce the description along with the dialog title and initially focused element when the dialog opens.
           </li>
           <li>
-            If the dialog has <a href="#aria-modal" class="property-reference">aria-modal</a> set to <code>true</code>and content outside the dialog is completely inert 
+            If the dialog has <a href="#aria-modal" class="property-reference">aria-modal</a> set to <code>true</code> and content outside the dialog is completely inert 
             and visually obscured to an extent that is intentionally unreadable, it is no longer necessary to set <a href="#aria-hidden" class="state-reference">aria-hidden</a>
             to <code>true</code> on each element containing a portion of the inert layer.    
             However, if you do still use <code>aria-hidden</code> set to <code>true</code>, the dialog container element cannot be a descendant