fix(popover): outsideClick should not fire on already-hidden popovers

Guard the outsideClick handler to skip popovers that are already
hidden, preventing spurious hide/hidden events on closed popovers
when clicking anywhere on the page.

Closes #2513

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bennypowers

.changeset/fix-popover-click.md

@@ -0,0 +1,6 @@
+---
+"@patternfly/elements": patch
+---
+
+`pf-popover`: clicking outside a popover no longer fires spurious
+hide events on other closed popovers.

elements/pf-popover/pf-popover.ts

@@ -351,6 +351,9 @@ export class PfPopover extends LitElement {
   };
 
   #outsideClick(event: MouseEvent) {
+    if (this.#hideDialog) {
+      return;
+    }
     const path = event.composedPath();
     if (!path.includes(this) && !path.includes(this.#referenceTrigger as HTMLElement)) {
       this.hide();