shell: Cleanup some of the ugly inline styles and other CSS on dashboard
shell: Dashboard servers not links while editable

The various dashboard servers are not links while in edit mode
shell: Cleanup rats nest of callbacks for dashboard hosts

We should be separating logic from presentation at least a bit.
Use data- attributes and delegated callbacks to accomplish this
shell: We never 'leave' the dashboard page, just hide it

Most of the legacy PageXxxx stuff is deprecated anyway, but going
forward we know one thing, we never really .leave() the dashboard
it is always being updated and a constant part of the shell.

Closes #1565