Add id to search button div in menubar

<!--- Please keep this note for other contributors --> How to use GitHub • Please use the 👍 [reaction]( to show that you are interested into the same feature. • Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue. • Subscribe to receive notifications on status change and new comments. Is your feature request related to a problem? Please describe. The introvox addon targets css selectors to explain the items on the Nextcloud dashboard to new users. All items in the menu have an ID except the search button. Adding an ID will make it easier to language independant target the search button. Describe the solution you'd like Add an ID to the unified search div. Describe alternatives you've considered Trying other selectors didn't have the effect one wants. Additional context <img width="901" height="118" alt="Image" src=" …