Similarly to https://www.virtualmin.com/node/38421 I don't believe there is a real need to make Virtualmin admins to actually click the button on "Webmin version 1.770 is now available, but you are running version 1.760." like messages. It would be much better to include this to "yum update" command.
When there is a Virtualmin update it is always recommended to upgrade. In fact we always anticipate new Virtualmin upgrades to get all the changes and features requests as soon as possible. And it is extremely inconvenient to go through each Virtualmin server to physically press those buttons, especially when you administer lot's of servers.
If Virtualmin was designed for the convenient use by hosting companies, this should be updated automatically.