fix(NcAppNavigationItem): Fix popper boundary element

Signed-off-by: Christoph Wurst <[email protected]>

[skip ci]

Author: ChristophWurst

src/components/NcAppNavigationItem/NcAppNavigationItem.vue

@@ -625,6 +625,10 @@ export default {
 		}
 	},
 
+	mounted() {
+		this.actionsBoundariesElement = document.querySelector('#content-vue') || undefined
+	},
+
 	data() {
 		return {
 			editingValue: '',
@@ -660,9 +664,6 @@ export default {
 		undoButtonAriaLabel() {
 			return t('Undo changes')
 		},
-		actionsBoundariesElement() {
-			return document.querySelector('#content-vue') || undefined
-		},
 	},
 
 	watch: {