Default label and annotation tab in machine registration

[juadk]

I would find more logical to see Machine Registration as default tab as we are in the machine registration menu instead of the machine inventory tab.

But in the other hand, the user has much more interest in filling out labels and annotations for machine inventories because they are useful for advanced filtering and identifying machines rather than the actual labels and annotations for machine registrations

Anyway I have updated my test code to switch on the good tab rancher/elemental#504
And I have to push a new code to test the new machine inventories tab.

@agracey @kwwii WDYT?

[kwwii]

I think that the main use-case here is to add labels to the inventories (I think mainly so that they can be added to clusters).
I don't know of any use-cases for adding labels or annotations to the machine registration resource itself.

[juadk]

Well I think you are right, the main purpose is adding labels to the inventories, thanks.

[agracey]

I think a better way to help here is to give a description in each tab about the purpose of the fields. This can be very confusing to new users so additional ways we can help understanding are useful.