refactor(core): use a11y activation util from `@nextcloud/vue`

* resolves https://github.com/nextcloud-libraries/nextcloud-vue/issues/2844

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

core/src/Util/a11y.js

@@ -1,21 +0,0 @@
-/**
- * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-/**
- * Return whether the DOM event is an accessible mouse or keyboard element activation
- *
- * @param {Event} event DOM event
- *
- * @return {boolean}
- */
-export const isA11yActivation = (event) => {
-	if (event.type === 'click') {
-		return true
-	}
-	if (event.type === 'keydown' && event.key === 'Enter') {
-		return true
-	}
-	return false
-}

core/src/jquery/contactsmenu.js

@@ -3,10 +3,9 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
-import $ from 'jquery'
-
 import { generateUrl } from '@nextcloud/router'
-import { isA11yActivation } from '../Util/a11y.js'
+import { isA11yActivation } from '@nextcloud/vue/functions/a11y'
+import $ from 'jquery'
 
 const LIST = ''
 	+ '<div class="menu popovermenu menu-left hidden contactsmenu-popover">'

core/src/jquery/ocdialog.js

@@ -3,9 +3,9 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
-import $ from 'jquery'
+import { isA11yActivation } from '@nextcloud/vue/functions/a11y'
 import { createFocusTrap } from 'focus-trap'
-import { isA11yActivation } from '../Util/a11y.js'
+import $ from 'jquery'
 
 $.widget('oc.ocdialog', {
 	options: {