Produce warning when a profile is connected to installs with different CLs

[budak7273]

Quite a few people are getting confused by the "profile keeps all connected installs in sync" behavior kicking in on installs they haven't used for a long time.

I don't think it makes sense for someone to intentionally use an outdated install and a modern install with the same profile, so this warning message could help avoid the confusion.

Maybe a dedicated pop-up?

Probably connect with #298's visualization.