It would be great to have an extra button in the hovering bar one has when at the bottom of a particular ticket and navigate from there back to the ticket list. Something like this:
Go back to ticket list from the hovering bar
Good idea.
This looks like a feature request. These days feature requests are usually done over at github. Open an issue report and pre-fix the title with [Feature Request] here: https://github.com/osTicket/osTicket/issues/new/choose