Tighten up Required Context Role: group (#1359)

* Tighten up Required Context Role: group
- only if group is contained in primary context role
* Fix Required Context Role for rowgroup in row

Author: carmacleod

index.html

@@ -5583,9 +5583,10 @@ <h4>Plain HTML or Polyfill DOM Result of the MathML Quadratic Formula</h4>
 						<th class="role-scope-head" scope="row">Required Context Role:</th>
 						<td class="role-scope">
 							<ul>
-								<li><rref>group</rref></li>
 								<li><rref>menu</rref></li>
 								<li><rref>menubar</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>menu</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>menubar</rref></li>
 							</ul>
 						</td>
 					</tr>
@@ -5685,9 +5686,10 @@ <h4>Plain HTML or Polyfill DOM Result of the MathML Quadratic Formula</h4>
 						<th class="role-scope-head" scope="row">Required Context Role:</th>
 						<td class="role-scope">
 							<ul>
-								<li><rref>group</rref></li>
 								<li><rref>menu</rref></li>
 								<li><rref>menubar</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>menu</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>menubar</rref></li>
 							</ul>
 						</td>
 					</tr>
@@ -5785,9 +5787,10 @@ <h4>Plain HTML or Polyfill DOM Result of the MathML Quadratic Formula</h4>
 						<th class="role-scope-head" scope="row">Required Context Role:</th>
 						<td class="role-scope">
 							<ul>
-								<li><rref>group</rref></li>
 								<li><rref>menu</rref></li>
 								<li><rref>menubar</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>menu</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>menubar</rref></li>
 							</ul>
 						</td>
 					</tr>
@@ -6046,8 +6049,8 @@ <h5>Note regarding the ARIA 1.1 <code>none</code> role.</h5>
 						<th class="role-scope-head" scope="row">Required Context Role:</th>
 						<td class="role-scope">
 							<ul>
-								<li><rref>group</rref></li>
 								<li><rref>listbox</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>listbox</rref></li>
 							</ul>
 						</td>
 					</tr>
@@ -7019,9 +7022,11 @@ <h5>Presentational Roles Conflict Resolution</h5>
 						<td class="role-scope">
 							<ul>
 								<li><rref>grid</rref></li>
-								<li><rref>rowgroup</rref></li>
 								<li><rref>table</rref></li>
 								<li><rref>treegrid</rref></li>
+								<li><rref>rowgroup</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>grid</rref></li>
+								<li><rref>rowgroup</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>table</rref></li>
+								<li><rref>rowgroup</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>treegrid</rref></li>
 							</ul>
 						</td>
 					</tr>
@@ -9958,8 +9963,8 @@ <h5>Presentational Roles Conflict Resolution</h5>
 						<th class="role-scope-head" scope="row">Required Context Role:</th>
 						<td class="role-scope">
 							<ul>
-								<li><rref>group</rref></li>
 								<li><rref>tree</rref></li>
+								<li><rref>group</rref> <abbr title="contained by" class="symbol">←</abbr> <rref>treeitem</rref></li>
 							</ul>
 						</td>
 					</tr>