#PrivateBin v1.7.6 released - Several quality-of-life frontend improvements & some backend code cleanup

I think we could now consider switching from the bootstrap 3 to the bootstrap 5 template as the default in the next release. Still need to migrate the templates of the info and directory websites to use bootstrap 5, though, so it all looks the same.

Is changing the look-and-feel of the default template, while keeping all of it's functionality the same, considered a major number change in terms of semantic versioning? We would not remove the old template, so if the old one is configured it would keep looking the same. See for example our template screenshots for a comparison of the two.