Page titles should include KKP (or similar)

[judge-red]

What is the problem, where is it and why is it an issue?

Currently the page titles (i.e. the <title> tag) do not include the platform's name. If I have a tab open that just reads Projects, that's not very helpful. I suggest you either add "KKP" oder "Kubermatic Kubernetes Platform" as a postfix. Ideally it would be configurable (at least for the EE edition) so we can set it to our product's name instead.

Suggest how to fix it, if possible

Add | Kubermatic Kubernetes Platform to all <title> tags. Make the string configurable through the KubermaticConfiguration (or KubermaticSettings). If preferred, the default could also be an empty string, to keep the current UI/UX, and just allowing us to define a postfix for the title tag.