Ability to disable logout / add custom logout url

[psibi]

Is your feature request related to a problem? Please describe.

This is how my kiali setup looks like:

• I use header authentication strategy
• I have a SSO based setup for authentication.
• With the header based authentication strategy, I have a logout displayed in the kiali menu.
• Clicking the logout menu, now actually takes me to the login page of the kiali. But this is clearly wrong: Because if I do a refresh - it shows the kiali dashboard. So the logout link actually doesn't do the logout (which is fine, since it's handled by the SSO setup)

Describe the solution you'd like

There are two ways this can be solved:

• Have the ability to disable the logout link. (Same behavior when anonymous authentication strategy is used)
• Ability to provide custom logout link. (Similar to custom health check urls)

Describe alternatives you've considered

I have provided two alternative solutions above. I guess any one of them could solve it, although having both of them would be nice!

Additional context

No additional context needed for this issue IMO. But let me know if anything is needed.

[israel-hdez]

@psibi I think the solution will be to hide the logout option. That's what the Kubernetes Dashboard is doing, so I think we will follow that pattern.

[psibi]

@israel-hdez Thanks, that sounds good to me. :-)