Fix assertion in "hide all popovers until"

Prevent an assertion from being hit in "hide all popovers until" by changing the conditions in which hide all popovers until gets called by the hide popover algorithm to use the opened in popover mode instead of looking at the current value of the popover attribute.

Fixes #10996.

Author: josepharhar

source

@@ -87253,9 +87253,8 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
    </li>
 
    <li>
-    <p>If <var>element</var>'s <code data-x="attr-popover">popover</code> attribute is in the <span
-    data-x="attr-popover-auto-state">auto</span> state or the <span
-    data-x="attr-popover-hint-state">hint</span> state, then:</p>
+    <p>If <var>element</var>'s <span>opened in popover mode</span> is "<code data-x="">auto</code>"
+    or "<code data-x="">hint</code>", then:</p>
 
     <ol>
      <li><p>Run <span data-x="hide-all-popovers-until">hide all popovers until</span> given